... has passed the SGS,ROHS,UL,CA117,BS5852 Certificates.1) Filter foam2) material: 100% polyurethane3)Reticulated and open cell4) ... water permeabilityFilter foamFilter foam is widely used for aquarium filter, air filter and other filtering business.Pu foam,Polyester foam, ... products are widely used for aquarium,pet,water pump,cleaning and filter business. 1 hardness: 20-100ptc 2Dimensions:make as ...