This lens rear bayonet mount ring is designed for use with Canon EF 70-200 F4L IS II USM lenses. It is compatible with Canon cameras and is made in Japan. The unit type is a lens ring and it is suitable for replacement parts and tools. The brand of the lens ring is Canon and it is compatible with Canon EOS cameras. The ring is fixed to the barrel tube and is suitable for use with digital cameras. This product is perfect for those looking to replace a damaged or worn out lens ring.