1.good dust release 2.excellent high temperature 3.anti acid & alkali 4. ... , 130, 140, 150, 160 etc. Special specification can be customize2) dust collector filter bag material : Polyester, PP, Acrylic , Aramid (Nomex), PPS , PTFE ... same material of bag bodySewing: 3 lines, 8 stitchesReinforcement underwrite technology