BQLZR White CAT5 Female to Female RJ45 Ethernet Keystone Jack Coupler Pack of 5 Plastic housing,gold plated contacts,straight-through wiring. There is a female jack on both sides of the connector so you can plug a cable into the back, as well as into the front. Keystone Snap-in Cat.5 couplers provide a full range of solutions for voice, home networking, home office, audio, video and more. It works with any wallplates and blank patch panels. Dimension:28 x 17 x 15mm/1.1 x 0.67 x 0.59"(L x W x T)