Check the listing for details. Silicone Soft Cap Lens Filter Only for K&F Concept 77mm Variable ND Filters. Condition: New. Listed at 15.29 USD. About this item 【Preuime Material】Made by TPU material , stain resistant not easy to stain, easily for carrying and cleaning. 【Convenient】Directly install on filter , no need to screw on it, take off it fast, protecting lens filter from all round. 【Scratch Resistant & Anti-Fall 】Soft TPU materail, more professional on anti-fall, harmless for filter frame and filter glass. 【Application】This filter lens cap only fit K&F Concept variable nd filter, couldn't compatible other brands variable nd filter. 【Note】This filter cap ONLY suitable for variable nd filter , couldn't be used on cpl+nd multifuctional filter, uv filter, cpl filter, fixed nd filter, black diffusion filter, magnetic filter and lens directly, before order the filter cap , please confirm your variable nd fitler size, 77mm filter cap only fit 77mm variable nd.