[UL Listed] VCE 5-Pack CAT6 RJ45 Keystone Jack Inline Coupler-White Double female cat6 keystone can be used with Cat.6, Cat5, CAT5e Ethernet cables Gold plated contacts and easy snap-in retaining clip ensure a secure and corrosion free connection Fits all standard keystone wall plates and panels CAT6 Keystone inline Coupler for voice, home networking, home office, audio, video and more Warranty:One Year Warranty for quality problem. With UL Listed, just use it without concern