1. The difference between the classic suction cup and the super suction cup: the super suction cup has a layer of black MOS polymer soft sealing material, which automatically fills the rough gap in the 1mm gap, rotates the lock and does not no longer has to worry about whether it falls. 2. Advantages: quick installation, long-lasting adsorption, resistant to humidity and water, not afraid of temperature changes. Automatically fills the rough surface within a millimeter of the dent (very powerful feature), 2-3 times increase in adsorption, unique 60 degree locking design. 3. Can be washed with tap water, repeated use. 4. No need for punching, nailing, gluing, waterproof and moisture resistance, very strong adsorption force, can be disassembled and reused, and there is no problem in humid environment. 5 . Immediately lock the vacuum cleaner, you can use it indefinitely. You can also perform the factory setting one-turn recovery. Just like new, turn it gently and hear the sound, and the vacuum cleaner is locked Just suck, lift is no longer a problem, turn left, press, then right, start to restore original factory settings, also known as vacuum setting, just like new.</ Quantity delivered: 2 pieces