*The boneless rain brush serise adopts the special spring metal and the compoud material of rubber under the modern design thoery.the function is far better than the traditional rain brush
*The tension memory of the whole rain brush can last longer within the using scope.This products have the characteristics such as durable,the waste warter won't be left in it,the noise is very low,ect.it won.t have the noise after one million time's continuously brush.