ITEM NAME:Aquarium Heater Suction Cups Suckers Clips 33Mm Dia Holders Clamps For Fish E2Q7 Aquarium Heater Suction Cups Suckers Clips 33Mm Dia Holders Clamps For Fish E2Q7 WIDELY USED: these heater holders fit for most standard aquarium heaters,can hold 1 inch diameter aquarium heater, PVC tubing or rain bar durable,have a strong adsortion on fish tank,perfect for aquarium and any glass surface. EASY TO INSTALL AND UNINSTALL:each suction cups comes with one clip,you can easily adjust the position and direction of your heaters,easy to install and uninstall,ideal for aquarium accessories. Product weight:4.2 oz. colour:black material:plastic size:3.3*3.8cm The clips diameter:24mm The suction cup diameter:33mm Package Contents: 15*Aquarium suction cup clip Please Note: These clips only suit for standard heater holder,not for airline / air tube For a better connection,please soak them in water for a while before use,they will works better. If rubber sution cup get warped,you also can soak them in hot water to relax the texture.