The 25-pack RJ-11 6P6C Cat3 rated 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 keystone jacks or even misplacing any extra keystone jacks you may have. Compatible with RJ11/14 and 25 Keystone Jacks and Plugs.