Air Duct hose 1.high strength,durable 2.corrosive resistant 3.fire resistant. Material: A high quality very flexible Flame Retardent ... handled and suitable for a wide range of low pressure air, fume and dust removal applications,such as mine; Tunnel ... ,durable,scuff resistant,corrosive resistant,fire resistant. It is no-poison, no peculiar smell. Without Dust, No fiber pulverized. Air Duct hose