These are 100% brand new authentic WBT-0144 (with serial numbers) RCA connectors. You have to see them in person to really witness their true beauty. These are top shelf connectors 100% Brand new & made of high quality Gold plated for maximum signal transfer & durability Accommodate cable with wire size up to 8.8 mm diameter. Soldering and screw locking Locking RCA for maximum connection Locking ground connection so plug doesn't come loose colour:black Material:metal size:6*5*3cm Package Contents: 4*Locking Plug Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.