... mechanical strength5,shapes by demand6, size by demand7,samples are free by demand8,ppi by demand,10ppi,15ppi,20ppi,25ppi,30ppi ... ,60ppi,80ppi.etc9, widely used in car industry, electronic industry, filtering industry, equipments, machinery, cushions, mattress, aquirum equipments,etcadvantages: 1, factory ...