1, factory direct sell,professional manufacturer 2,good air premeanlity 3,good limpness 4,high mechanical strength 1, factory direct sell,professional manufacturer2,good air premeanlity3,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, ...