JJC SC-77 Filter Stack Cap 77MM protect filters from dust and scratches while they are not being used JJC SC-77 Filter Stack Cap 77MM protect filters from dust and scratches while they are not being used Simply screw the filters together, then screw these stack caps on the top and bottom. Great for storing filters when not in use! Protects the front element of the lens Filter from scratch and dust JJC SC Metal Filter Stack Caps protect filters from dust and scratches while they are not being used. Designed for Pro photographers & serious hobbyists who are looking for maximum work flow & professional level look & durability . QUALITY SERVICE & LOW PRICES GUARANTEED Free same day shipping