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 CON-RJ45-3 is a crimp-style 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 CON-RJ45-3 connector is designed to fit larger 23AWG cables, but it also fits 24AWG cables. All shielded twisted-pair cables (STP) require a shielded connector. For guaranteed optimal performance, use Kramer CON-RJ-45-3 connectors with Kramer BC-UNIKat cables.