1.Fashionable & nice appearance. 3.Never occur block,even the debris dropped into,can be suck out successfully.. 4.Spring is no needed, solve the rustiness and spring failure problem caused by it. 5.ABS material , cannot be break at all ,truly durable for using . 6.Variety of detergents: soap ,shampoo,cleanser.7. It can be used for Stars Hotel, bathroom,office building, hotel, hospital ,restaurant and so on.