TRIPP LITE's N238-010-BK CAT 6 / CAT 5e 110 style punch down keystone jacks provide maximum flexibility for any UTP Ethernet environment. Ideal for CAT 5e cabling environments, the jack also meets UL-certified ANSI/TIA/EIA-568-B.2-1 Permanent link or channel identification test for CAT 6 cabling installations. The uniquely patterned printed circuit board construction is designed to meet CAT 6 250 MHz performance and is fully compliant with EIA/TIA CAT 6 connecting hardware specifications. With its compact casing, it fits into any conventional faceplate, outlet box, or panel. It also features dual-color coded labeling made for both 568A and 568B (258A) wiring schemes.