Air permeability tester is designed and manufactured according to GB/T 10655-2003 which is equal to ISO4638-1984, and compatible with GB/T5453-1997, ISO9237-1995, ASTM D737-96, GB/T4689.22-1996, GB/T13764-92 and other related standards. We also refer to standards and criterions of many international famous automotive manufactures. This equipment is applicable for air permeability test and air resistance test for auto seat materials like PVC, foam, leather, textile, non-woven cloth, and so on. Users can control materials