Monoprice 108729 Keystone Jack Toslink Female to Female Coupler Adapter, White
This keystone jack provides a female S/PDIF Digital Optical (TOSlink) connection on each side and is intended for use in standard keystone wall plates and other keystone devices. The keystone measures 31/32" long by 13/16" tall by 3/4" wide. The core receptacle inside is gold-plated