Filter stack caps are a handy way to organize and carry same size filters.
It consists of a set of top and bottom durable metal caps to fit filters with different diameters.
Male Screw-in Cap also works as lens cap, fits for Canon Nikon Sony lens and other brand lens which has the same filter thread.
They will protect the filters from dust, scratches and fingerprints while not in use.
Simply screw your filters together then screw the stack caps on the top and bottom.
Additionally, this enables a more organized, streamlined system for storing and carrying your filters.
That's to say, it is easy to carry and takes up a little space.

Material: Aluminium alloy
Color: Black
Size: 55mm
Compatible with: Filter stack caps fits for 55mm filters Filters can be stacked together)
Front Male Screw in cap can also work as 55mm lens cap, fits for 55mm lens.