... 4.use: clean/ filter filter sponge Factory directly sell,low price,good quality, size,packing ,colour can according to your ... request.filter sponge 1) Material: PU sponge,10ppi,15ppi,20ppi,25ppi,30ppi ... welcomed.Advantages:Factory directly sell,with high quality and competitive price,And we use environmental-friendly material,lead free,no ...