Tronixpro 67mm Pro Series Snap On Lens Cap For Canon EF 100mm f/2.8L Macro IS USM Lens, Canon 18-135mm f/3.5-5.6 EF-S IS STM Lens, Canon EF 70-300mm f/4-5.6L IS USM Lens This lens cap protects lens surface from dust & shock during storage. Unique snap on design allows easy installation onto the lens & one-step removal from the lens. It fits directly onto the lens with a double-action spring design. Microfiber Cloth 67mm Snap On Lens Cap