Each of the blue, yellow, and red Lee Filters Lens Caps within this three-pack can be pushed onto a LEE Filters Seven5 Micro System filter holder adapter ring. Their design allows these lens caps to protect the front element of a lens that any one of those adapter rings are mounted on. A Seven5 Micro System filter holder can then be used among multiple lenses without having to remove a mounted adapter ring in order to use a lens's own cap.
A pull-tab is located along the edge of each cap for easy removal from a compatible adapter ring.