Item Type: Scope Lens CoverMaterial: Rubber 1SIZE: The caliber size is the inner size of the cover and the outer diameter of the scope, you need to measure the diameter of the scope before purchasing. 2FLIP COVER: The flip cover can protect the telescope or objective lens from damage or breakage, keep the lens clean when not in use. 3RUBBER MATERIAL: Scope lens cover is made of premium rubber material, waterproof and durable, it can be used in rainy or snowy days with long service life. 4LENS PROTECTION: Scope lens cover can be attached to each lens independently, and provide additional protection for your lens. 5APPLICABLE OBJECTS: Flip open scope lens cover is compact and portable, suitable for scopes, eyepieces, objective lenses, monoculars.