Suitable for sponge holder, bird feeder, home decoration, craft project, windshield and radar detector. Perfect as a replacement for worn suction cups. A large contact area of 3 cm can provide stronger suction. Maximum load for each suction cup: 1.4 kg. Sticks to any clean, dry, smooth, non-porous surface such as glass, window, metal, tile, aquarium, and marble. Soft PVC plastic resists crushing and wear. If the suction cups are deformed, soak them in warm water for about 2 minutes. What You Get: 20 packs of 3cm large suction cups without hooks. Clear Suction Cup Nice and soft for good adhesion 20 Pack 3cm clear thick suction cups are made of soft PVC plastic which is flexible to allow you to easily stick them on any smooth surface such as glass, window, metal, marble or tile, etc. Not suitable for wood, paint, grease stains, leaks and crevices. Unique mashroom head design, no holes at the top. Made of soft PVC plastic Easy to stick and remove 3 cm outer diameter Maximum load of the