1.materials : fiberglass fabric,PTFE felt,polyester felt,nomex felt 2.weight : 370- 1800g/m2 3.thickness: 0.37mm-2.2 mm We, Yingkou Chuangshiji (CSJ) Filter Materials Co.,Ltd, which joint with Ameica company, can provide engineering and drawings for a dust collection filter bags for your application on an engineering basis. CSJ also manufacture PTFE products, such as complex fiber, carrier fiber, ...