Notice: Please note about the size of this thread extender. It may not fit all cameras. Please get longer thread extender if it is not suitable for your application. Features: *M12 thread interface extender. *Extend M12 interface for CCTV lens. *A 10mm Adapter Ring attaches between a lens and a board camera. *If you have a lens on your camera that is too far to make image clear, you need the adapter to put between lens and camera. *Easy installation and convenient to use. Specifications: Color: Black Material: Zinc alloy Item Size(Each): Approx. 14*10mm (D*H) Package Information: Package Size: Approx. 9 * 6 * 3cm / 3.5 * 2.4 * 1.2in Package Weight: Approx. 5g / 0.2oz Package List: 5 * M12 Thread Extender