"This unique family of USB couplers allow USB cables to be efficiently passed through a panel or enclosure. Furthermore, they are available in many USB connector combinations with your choice of shielded and unshielded housing versions. Unshielded couplers are available in black or ivory and shielded couplers are metallic. Securely mounts via 4-40 screws, must be purchased separately (P/N ECF440). All stock ships same day."