This shielded RJ45 connector is designed to fit larger 23AWG cables, but also fits 24AWG cables. All shielded twisted pair cables (STP) cables require a shielded connector. The Kramer CONRJ453 is a crimpstyle shielded connector for conductors in a 24AWG to 23AWG twisted pair cable with an overall insulation diameter of 1.40mm to 1.50mm. The Kramer CONRJ453 connector is designed to fit larger 23AWG cables, but it also fits 24AWG cables. All shielded twistedpair cables (STP) require a shielded connector. For guaranteed optimal performance, use Kramer CONRJ453 connectors with Kramer BCUNIKat cables.