Special sponge: original idea terms is different from general ordinary sponge. Also is without chemical additives to change its foaming characteristics of ordinary sponge.

Special sponge species has a lot of kinds. About common I give some examples, such as: coarse hole filter cotton, cotton, polyester cotton, seaweed, compression or water sponge, and some with special technology processing, silicone sponge, ceramic sponge, activated carbon, etc.