Newest trent 3" 22 lbs Super Powerful Heavy Duty Double Locking Suction Cup Hooks With Inner Thread Lock And Natural Soft Suction Rubber (Set of 5/10/15) Strong multi-purpose suction cup hooks for smooth shiny surface is available. With strong inner thread lock and high quality natural soft suction rubber. Works great on smooth non-porous surfaces such as tile glass fiberglass. Diameter: 3", Color is random. Rated to hold up to 22lbs.