B00D7GADR4 NatureScapes Lens Replacement Foot for Canon EF 400mm f2.8L IS II, EF 500mm f4L IS II, EF 600mm f4L IS II & EF 200-400mm f4L IS II 1.4x

Make sure this fitsby entering your model number. The CLF-456 fits Canon EF400mm f2.8L IS II, Canon EF500mm f4L IS II, Canon EF600mm f4L IS II and Canon EF200-400mm f4L IS II with 1.4X converter Arca-swiss compatible, Lightweight, Precision design Made of super strong 6060 aluminum