GE4-021 Lightweight flexible hose for connecting the power unit to the headpiece. QuickLOCK connector on one end, CA40x1/7″ thread on the other, for fast and secure connections of the full range of CleanAIR options. More options available on request, including extended lengths, adapters and flame/chemical proof covers. Downloads: A complete CleanAIR PAPR system needs: 1x Unit & Filters, 1x Hose, 1x Faceshield/Headtop Please note: Backorders for this item may be up to 4 weeks.