--- product_id: 457703749 title: "- Noise Reduction Clamp 4-Inch, Duct Coupler" brand: "ac infinity" price: "₩43673" currency: KRW in_stock: true reviews_count: 13 category: "Ac Infinity" url: https://www.desertcart.kr/products/457703749-noise-reduction-clamp-4-inch-duct-coupler store_origin: KR region: South Korea --- # Noise reduction up to 30%+ Adjustable stainless steel clamps Durable matte black nitrile rubber - Noise Reduction Clamp 4-Inch, Duct Coupler **Brand:** ac infinity **Price:** ₩43673 **Availability:** ✅ In Stock ## Summary > 🔇 Seal the silence, lock the airflow — upgrade your duct game now! ## Quick Answers - **What is this?** - Noise Reduction Clamp 4-Inch, Duct Coupler by ac infinity - **How much does it cost?** ₩43673 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/457703749-noise-reduction-clamp-4-inch-duct-coupler) ## Best For - ac infinity enthusiasts ## Why This Product - Trusted ac infinity brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Pro-Grade Durability:** Industrial-grade materials built to last through heavy use - • **Universal 4-Inch Fit:** Seamlessly connects inline fans and carbon filters in HVAC & grow rooms - • **Heavy-Duty Flexibility:** Premium nitrile rubber adapts to duct ports without cracking - • **Airtight Seal Guarantee:** Prevents air leaks with precision worm-drive clamps - • **Whisper-Quiet Performance:** Minimizes fan vibration noise for a peaceful environment ## Overview The AC Infinity Noise Reduction Clamp 4-Inch is a professional-grade duct coupler crafted from flexible nitrile rubber and secured with adjustable stainless steel worm-drive clamps. Designed to fit inline fans and carbon filters, it creates an airtight seal that significantly reduces noise and vibration in HVAC and indoor growing setups. Its durable matte black finish and precise fit make it a must-have for anyone seeking quieter, leak-free ventilation systems. ## Description AC Infinity Noise Reduction Clamp 4-Inch, Duct Coupler | Stainless Steel Clamps, Flexible Rubber Coupling for Inline Fans and Carbon Filters in Growing and HVAC - desertcart.com Review: 5/5 Stars: The Perfect Upgrade for a Quiet and Sealed System! - If you are looking to optimize your ventilation setup, the AC Infinity Noise Reduction Clamp 6-Inch is an absolute must-have. This duct coupler acts as a flexible rubber coupling specifically designed for connecting inline fans and carbon filters. It has been a phenomenal addition to my AC Infinity ecosystem, ensuring my indoor growing environment stays perfectly dialed in and operates smoothly. ​Premium Build Quality ​Right out of the packaging, you can tell this is a high-quality piece of gear. ​Heavy-Duty Materials: The thick, flexible rubber feels incredibly durable and features the "AC INFINITY" logo sleekly embossed right on the side. ​Secure Hardware: It comes equipped with rugged stainless steel clamps. ​Precise Tolerances: The metal bands feature precise size markings like "141-165", ensuring you know exactly what tolerances you are working with when tightening down the system. ​Internal Padding: The inside of the clamp features a dense, protective foam layer that helps ensure a snug, insulated, and flush fit against your equipment. ​Flawless Performance ​This specific model, the AC-RCA6, delivers exactly what it promises on the packaging. ​Noise Reduction: By decoupling the rigid connections between the fan and the filter, it functions perfectly as a "NOISE REDUCTION CLAMP" to significantly cut down on vibration and operational humming. ​Airtight Grip: The clamp provides an incredibly secure hold, which is critical for maintaining "SEALED PROTECTION" and preventing any untreated, odorous air from leaking out of the exhaust system. ​Universal Compatibility: It effortlessly bridges the gap between different 6-inch components, living up to its claim of providing a "VERSATILE FIT" for both growing environments and general HVAC applications. ​Final Verdict: For the price point, this is a no-brainer upgrade. The presentation is professional, arriving in a sleek black bag clearly branded with the AC Infinity logo. If you want to eliminate air leaks, reduce the decibel levels of your exhaust line, and seamlessly integrate components, look no further! Review: Really Nice. Extremely well made. Great product. Great Shipping. Great price. - Really Nice. Extremely well made. Great product. Great Shipping. Great price. ## Features - Rubber pipe coupling designed to securely pair ducted components together while preventing air leaks. - Matte black rubber construction is flexible, heavy-duty, and can easily fit over duct ports and piping. - Minimizes noise by absorbing sound waves from fan vibrations and airflow traveling through ductwork. - Creates an airtight seal and hold using adjustable stainless steel hose clamps with worm drive locks. - 4 inch coupler fits inline fans and carbon filters with solid duct ports in growing and HVAC settings. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B6JPT3BB | | Best Sellers Rank | #11,266 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #12 in HVAC Ducting | | Brand | AC Infinity | | Brand Name | AC Infinity | | Color | Matte Black | | Customer Reviews | 4.7 out of 5 stars 1,049 Reviews | | Item Diameter | 4 inches | | Item Highlight | Stainless Steel Clamps, Flexible Rubber Coupling for Inline Fans and Carbon Filters in Growing and HVAC Item Highlight Stainless Steel Clamps, Flexible Rubber Coupling for Inline Fans and Carbon Filters in Growing and HVAC See more | | Manufacturer | AC Infinity | | Material | Nitrile Rubber | | Material Type | Nitrile Rubber | | Number of Items | 1 | | Number of Packs | 1 | | Style | Industrial | | Style Name | Industrial | | UPC | 819137023529 | | Unit Count | 1 Count | ## Product Details - **Brand:** AC Infinity - **Color:** Matte Black - **Item Diameter:** 4 inches - **Material:** Nitrile Rubber - **Number of Items:** 1 - **Number of Packs:** 1 - **Style:** Industrial - **UPC:** 819137023529 - **Unit Count:** 1 Count ## Images ![- Noise Reduction Clamp 4-Inch, Duct Coupler - Image 1](https://m.media-amazon.com/images/I/51V8l10uctL.jpg) ## Questions & Answers **Q: I see the inside diameter, but what is the width?** A: About 3” **Q: what is ID and OD?** A: Inner dimension & Outter dimension **Q: Do they make them for 10 inch fans?** A: Yes they do, Cloudline T10 ## Customer Reviews ### ⭐⭐⭐⭐⭐ 5/5 Stars: The Perfect Upgrade for a Quiet and Sealed System! *by M***N on June 20, 2026* If you are looking to optimize your ventilation setup, the AC Infinity Noise Reduction Clamp 6-Inch is an absolute must-have. This duct coupler acts as a flexible rubber coupling specifically designed for connecting inline fans and carbon filters. It has been a phenomenal addition to my AC Infinity ecosystem, ensuring my indoor growing environment stays perfectly dialed in and operates smoothly. ​Premium Build Quality ​Right out of the packaging, you can tell this is a high-quality piece of gear. ​Heavy-Duty Materials: The thick, flexible rubber feels incredibly durable and features the "AC INFINITY" logo sleekly embossed right on the side. ​Secure Hardware: It comes equipped with rugged stainless steel clamps. ​Precise Tolerances: The metal bands feature precise size markings like "141-165", ensuring you know exactly what tolerances you are working with when tightening down the system. ​Internal Padding: The inside of the clamp features a dense, protective foam layer that helps ensure a snug, insulated, and flush fit against your equipment. ​Flawless Performance ​This specific model, the AC-RCA6, delivers exactly what it promises on the packaging. ​Noise Reduction: By decoupling the rigid connections between the fan and the filter, it functions perfectly as a "NOISE REDUCTION CLAMP" to significantly cut down on vibration and operational humming. ​Airtight Grip: The clamp provides an incredibly secure hold, which is critical for maintaining "SEALED PROTECTION" and preventing any untreated, odorous air from leaking out of the exhaust system. ​Universal Compatibility: It effortlessly bridges the gap between different 6-inch components, living up to its claim of providing a "VERSATILE FIT" for both growing environments and general HVAC applications. ​Final Verdict: For the price point, this is a no-brainer upgrade. The presentation is professional, arriving in a sleek black bag clearly branded with the AC Infinity logo. If you want to eliminate air leaks, reduce the decibel levels of your exhaust line, and seamlessly integrate components, look no further! ### ⭐⭐⭐⭐⭐ Really Nice. Extremely well made. Great product. Great Shipping. Great price. *by J***M on July 24, 2026* Really Nice. Extremely well made. Great product. Great Shipping. Great price. ### ⭐⭐⭐⭐⭐ For DIY turbocharged air intake *by J***2 on August 29, 2026* Love it. Worked for my project perfectly ## Frequently Bought Together - AC Infinity Noise Reduction Clamp 4-Inch, Duct Coupler with Stainless Steel Clamps, Flexible Rubber Coupling for Inline Fans and Carbon Filters in Growing and HVAC - AC Infinity Flexible 4-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 8-Feet Long for Heating Cooling Ventilation and Exhaust - AC Infinity Air Carbon Filter 4" with Premium Australian Virgin Charcoal, for Inline Duct Fan, Odor Control, Hydroponics, Grow Rooms --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.kr/products/457703749-noise-reduction-clamp-4-inch-duct-coupler](https://www.desertcart.kr/products/457703749-noise-reduction-clamp-4-inch-duct-coupler) --- *Product available on Desertcart South Korea* *Store origin: KR* *Last updated: 2026-09-07*