Standard toslink keystone insert. Accepts a standard toslink cable at the front and rear of connection.WARNING: Our KM-TOS-## Toslink Cables are not compatible (ie will not fit) the inchwall-endinch side of this keystone connector as our square toslink cable ends are too large for the receiving end. Our HA-TOS-## PREMIUM Toslink Cables ARE compatible and will fit properlyEstimated ACTUAL Quantity Available: 46. Should you need more stock than our advertised quantity of 50pcs, please click the CONTACT SELLER link and let us know how many you need and we will update the TOTAL QUANTITY available.