--- product_id: 291801667 title: "7 Pin Round to 4 and 5 Pin Flat Blade Trailer Adapter, 7 Way to 5 Way Trailer Plug Adapter 2-in-1 Design" brand: "oyviny" price: "₩41868" currency: KRW in_stock: true reviews_count: 13 category: "Oyviny" url: https://www.desertcart.kr/products/291801667-7-pin-round-to-4-and-5-pin-flat-blade store_origin: KR region: South Korea --- # Brass terminals for superior conductivity 2-in-1 7-pin to 4/5-pin adapter Waterproof, heavy-duty nylon housing 7 Pin Round to 4 and 5 Pin Flat Blade Trailer Adapter, 7 Way to 5 Way Trailer Plug Adapter 2-in-1 Design **Brand:** oyviny **Price:** ₩41868 **Availability:** ✅ In Stock ## Summary > 🚛 Connect with confidence—tow smarter, not harder! ## Quick Answers - **What is this?** 7 Pin Round to 4 and 5 Pin Flat Blade Trailer Adapter, 7 Way to 5 Way Trailer Plug Adapter 2-in-1 Design by oyviny - **How much does it cost?** ₩41868 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/291801667-7-pin-round-to-4-and-5-pin-flat-blade) ## Best For - oyviny enthusiasts ## Why This Product - Trusted oyviny brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rugged Durability:** Waterproof nylon casing and brass terminals ensure long-lasting, corrosion-resistant performance. - • **Secure Fit Every Time:** Precision-engineered to snap firmly into place—no loose connections, no trailer light failures. - • **Effortless Plug & Play:** No cutting or splicing needed—install or remove in seconds with ergonomic side handles. - • **Universal 2-in-1 Design:** Seamlessly switch between 4-pin and 5-pin trailer connections with one sleek adapter. - • **Versatile Compatibility:** Works flawlessly with Chevrolet, Ford, Toyota, RAM, GMC, and more—perfect for trailers, RVs, boats, and ATVs. ## Overview The Oyviny 7 Pin Round to 4 and 5 Pin Flat Blade Trailer Adapter is a universal, heavy-duty towing solution that converts a 7-way RV-style connector into 4-pin or 5-pin flat trailer plugs. Featuring waterproof nylon housing, brass terminals for optimal conductivity, and a secure snap-in fit, this 2-in-1 adapter offers hassle-free installation and broad vehicle compatibility, making it the go-to choice for reliable trailer lighting connections. ## Description Buy Oyviny 7 Pin Round to 4 and 5 Pin Flat Blade Trailer Adapter, 7 Way to 5 Way Trailer Plug Adapter 2-in-1 Design: Connectors - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Good option - Perfect fit. I have a 26 palisade and needed to plug a 4 pin and this adapter works perfectly. Easy to install and seems to be good quality. Review: Simple, inexpensive fix - Bought a trailer and then realized the cord plug in system underneath was damaged after having electrical work done on the truck. This fixed the problem. It's a safe option vs rigging something togwther that may not be safe long term. Plugged 7 blade into truck, exposed 4 pin to pkug into trailer. Now ALL the lights work! We're legal. We have a 10 ft trailer so we're required to have lights and we should since all the equipment is there. This fixed our problem for less than $15 at the time of purchse. Store options were $45-60. All black, looks good (like it's factory), and works as described ## Features - 7 Pin to 4 and 5 Pin Trailer Adapter: Oyviny trailer plug adapter adopts the 2 in 1 design, converts a 7 way RV-style connector to a standard 4-pin or 5-pin flat trailer connector, suitable for Chevrolet, Ford, Dodge, RAM, Toyota or GMC, Boat, Trailer, RV, ATV etc. - 7 Pin to 5 Pin Trailer Adapter: Tight-fitted 7 way to 5 way towing adapter features standard round 7-way flat blade connector, easily snaps into trailer's existing socket and holds securely, NO LOOSE FITTING - Durable Construction: Heavy duty nylon housing is waterproof and temperature resistant, Brass terminals provide superior conductivity; With 2 dust covers at the plug, it keeps terminals clean and protected when not in use towing a trailer - Easy Installation: Simple Plug & Play design eliminates the need for cutting or splicing, hassle free setup, easy to install and remove; 7 pin to 4 pin trailer adapter features two handles on either side of the plug for a better grip when plugging in or unplugging trailer wiring - Wide Application: 7 pin round to 4 pin flat trailer plug adapter works great with any factory OEM 7-way plug, you could choose to tow 4 way or 5 way trailer with one adapter, adding versatile towing options for your vehicle ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08MDW63DH | | Automotive Fit Type | Universal Fit | | Best Sellers Rank | #321 in Automotive ( See Top 100 in Automotive ) #1 in Trailer Connectors | | Brand | Oyviny | | Brand Name | Oyviny | | Compatible with Vehicle Type | ATV, Car, Marine-Personal-Craft, Tractor, Trailer | | Customer Reviews | 4.6 out of 5 stars 2,366 Reviews | | Finish Type | Polished | | Manufacturer | Oyviny | | Manufacturer Part Number | S70-45-001 | | Material | Nylon | | Material Type | Nylon | | Model Number | S70-45-001 | | UPC | 769894715529 | | Unit Count | 1.0 Count | | Vehicle Service Type | ATV, Car, Marine-Personal-Craft, Tractor, Trailer | ## Product Details - **Automotive Fit Type:** Universal Fit - **Brand:** Oyviny - **Finish Type:** Polished - **Material:** Nylon - **Vehicle Service Type:** ATV, Car, Marine-Personal-Craft, Tractor, Trailer ## Images ![7 Pin Round to 4 and 5 Pin Flat Blade Trailer Adapter, 7 Way to 5 Way Trailer Plug Adapter 2-in-1 Design - Image 1](https://m.media-amazon.com/images/I/81BR1im6M4L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good option *by J***1 on June 23, 2026* Perfect fit. I have a 26 palisade and needed to plug a 4 pin and this adapter works perfectly. Easy to install and seems to be good quality. ### ⭐⭐⭐⭐⭐ Simple, inexpensive fix *by L***Y on June 22, 2026* Bought a trailer and then realized the cord plug in system underneath was damaged after having electrical work done on the truck. This fixed the problem. It's a safe option vs rigging something togwther that may not be safe long term. Plugged 7 blade into truck, exposed 4 pin to pkug into trailer. Now ALL the lights work! We're legal. We have a 10 ft trailer so we're required to have lights and we should since all the equipment is there. This fixed our problem for less than $15 at the time of purchse. Store options were $45-60. All black, looks good (like it's factory), and works as described ### ⭐⭐⭐⭐⭐ Good quality *by S***S on June 20, 2026* Works great ## Frequently Bought Together - Oyviny 7 to 4 & 5 Pin Trailer Adapter, 2-in-1 Design - MaxxHaul 80778 Magnetic Towing Light Kit (Dual Sided for RV, Boat, Trailer and More DOT Approved), 1 Pack - LIMICAR Trailer Wiring Harness Extension Kit, 25ft Trailer Wiring Harness with 4 Flat Extension Connector, 4 Pin Flat Wishbond Trailer Harness for Utility Boat Trailer Lights Kits --- ## 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/291801667-7-pin-round-to-4-and-5-pin-flat-blade](https://www.desertcart.kr/products/291801667-7-pin-round-to-4-and-5-pin-flat-blade) --- *Product available on Desertcart South Korea* *Store origin: KR* *Last updated: 2026-07-25*