JJC Metal Lens Filter Stack Cap Filter Protective Case for 67mm Ultraviolet UV Filter Circular Polarizer CPL Filter Neutral Density ND Filter and More Filters in 67mm Thread Size,Upgraded Slim Version - SC-67II

• Protect the lens filters from dust, scratches and fingerprints while not in use Simply screw one or more filters together then screw the stack caps on the top and bottom (Note: Filters are NOT included) Enable a more organized, streamlined system for storing and carrying your filters Made of aluminium alloy, slim and durable Fits for any filter with 67mm inner thread(male) and 67mm outer thread(female) - Normally the inner thread and the outer thread of a lens filter are the same size, but for the Variable ND filters, they are normally not the same, the outer thread of a Varibale ND filter is normally larger than its inner thread, so this stack cap will not work for variable ND filters