Is this considered lmr 400 cable coupler? that's what my internet service provider told me that i'd need to connect 2 25'-pieces together for antenna

You need LMR 400 bullet aka coupler. I bought N-type coupler - they look similar but LMR400 had much larger diameter center pin ...google lmr400 and look at images ...

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2PCS N Female to N Female Connector RF Coax Cable Adapter Barrel Connectors Double Female Connector Plug by XRDS-RF(NOT for TV)

2PCS N Female to N Female Connector RF Coax Cable Adapter Barrel Connectors Double Female Connector Plug by XRDS-RF(NOT for TV)

Product ID: 519812362

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Details

Brand
XRDS -RF
Connector type
Coaxial
Cable type
Coaxial
Compatible devices
Television
Special feature
Weatherproof

📶0.1dB ultra-low signal loss

⚙️50Ω impedance for perfect matching

🌡️-40 to 80°C weatherproof durability

Description

🔗 Connect Like a Pro — Signal Integrity Meets Rugged Reliability

SEAMLESS SIGNAL FLOW - Experience near-zero attenuation with just 0.1dB loss, keeping your connections crystal clear.
PRECISION ENGINEERING - 50-ohm impedance and VSWR <1.15 ensure optimal RF performance up to 6GHz.
PLUG PLAY SIMPLICITY - Effortless installation connects N-type male coax cables instantly—no fuss, no downtime.
VERSATILE CONNECTIVITY - Perfect for antennas, ham radios, Wi-Fi, telecom, and digital communication systems.
BUILT TO BRAVE THE ELEMENTS - Heavy-duty all-metal housing with salt spray resistance for reliable outdoor use.

The XRDS-RF 2PCS N Female to N Female Connector set offers ultra-low signal attenuation (0.1dB) and a stable VSWR below 1.15, supporting frequencies up to 6000MHz. Crafted from copper with gold-plated brass pins and a Teflon insulator, these weatherproof adapters deliver durable, high-performance connections for professional RF applications including antennas, ham radios, and telecom systems.

Specifications

Manufacturer	XRDS-RF
Item Weight	85 g
Package Dimensions	8.1 x 7.4 x 3.2 cm; 85 g
Item model number	0dd0c1e1-ce4e-439a-b0b8-6649a4ec15a3
Size	2pcs N female to N female
Colour	N female type adapter
Finish	Gold
Shape	Round
Item Package Quantity	1
Special Features	Weatherproof
Batteries included?	No
Batteries Required?	No

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