... We are one of the biggest factory specializing cleaning sponge&bath items dannijia bathtub cleaning brushes 1.Material:pp+sponge2.Sponge size:15 ... *9*2cm3.Usage:cleaning With different size thick nylon ... from scratches. With more corundum ,it can do toughest cleaning jobs. It applies in pool,bathtub,sink,wall,floor,etc ...