1,good filtering function 2,good elastic 3,density by demand 1, factory direct sell,professional manufacturer2, water absorbent;3,good limpness4,high mechanical strength5,shapes by demand6, size by demand7,samples are free by demand8,ppi by demand,10ppi,15ppi,20ppi,25ppi,30ppi,35ppi,40ppi,60ppi,80ppi.etc9, widely used in car industry, electronic industry, filtering industry, equipments, machinery ...