This is a Silver Embossed Replacement Lens Cap For Canon 77mm Lenses as good as original. The word cap stands for protection. The Silver Embossed Lens cap is made up of ABS grade plastic, High quality snap-on lens cap for speedy installation and removal. Extra strong design with double action springs. Simply squeeze sides and place on lens. At this low price, most people purchase several to leave in the camera bag so you will never be stranded without a lens cap. It Helps protect front part of lens from dust and scratches, they cover front element of the camera thus providing resistance from dust, dent & damage. Protect your lens, tele-converter and camera body mount caps. Lens caps protect the front portions of your lenses and tele-converters from dust, smudges and scratches.