... lots of colors 3.density:according to the demand of customer PU filter foam1.material:PU2.color:black,white, ... ,from large to small.4.density:according to the demand of customer.5.size:1m*2m;thickness: ... according to the demand of customer.6.usge:we can make a variety of PU filter foam with ... different color,density,ppi as curtomer's demand.the filter foam can filtrate water,dust,oil,air,and ...