1. Wash the surface of the phone with a diameter of 3. 2CM, and set the tap of 3-4. 8CM in diameter. A faucet that is too small or bent vertically downwards is not suitable. To avoid repurchasing, use an outlet diameter (a faucet less than 3 cm in diameter or a faucet larger than 4. 8 cm). 2. About the material: We are made of soft rubber. The texture is very soft and the quality is very good - due to the weather, the water will harden and the water will soften3. About the size: If the professional faucet is slightly larger than the suit, please do not use the bubble of about 40 degrees to enter, and then screw it in4. This product can increase the fun of children washing their hands. Let them fall in love with washing their hands.