... ,60ppi,70ppi,80ppi polyurethane filter foam1.10 ppi ,20ppi,30ppi,40ppi,50ppi,60ppi,70ppi,80ppi 2.used different area,density as 30KG ... .3.Colour as customer's request. Water foam filter 1) factory direct sell ... ,100% good quantity.2) it with various of pore size (10~80ppi) and different color.3 ...