The HD 25-pack RJ-11 6P6C CAT3 cable compatible modular jacks saves you time and money, It is ideal for all voice and business system applications, The 25-pack has a resealable strip at the top to prevent any mixing of colors or types of keysstone jacks or even misplacing any extra keystone jacks you may have, Compatible with RJ11/14 and 25 keystone jacks and plugs