"L-com's premium line of Modular Couplers combines innovative design with an affordable price. With a solid die-cast metal mounting frame, these unique coupler kits allow panel mounting in virtually any panel thickness. Designed to work with EIA/TIA 568A and B wiring, these couplers offer a reliable method to pass high-speed data communication through a chassis or rack panel. Couplers listed include Category 3, 5E and 6 performance ratings in both Shielded and Unshielded versions. Kits include a snap-in coupler, mounting frame and 4-40 machine screws."