... PVC ducting 1,fire-retardant PVC material 2,competitive price,fine quality 3,Oil, Acid, Alkai & high temperature Resistant PVC ducting, air duct, air ducting ... , flexible duct, ventilation duct1,Material: PVC flam-resistant static-free fabric with steel wire reinforced.2.PVC ... .keep more savely and effectively during working.with the strap or pp rope can conveniently ...