Flex-Tube PU is medium-weight, clear, co-extruded thermoplastic ether-based polyurethane hose with rigid yellow external ABS helix, while Flex-Tube PV is medium-weight, clear, co-extruded PVC hose with rigid black PVC helix. Both feature smooth interiors for efficient airflow and come in 1, 1¼, 1½, and 2 in. dia sizes up to 100 ft long. With helix acting as wear strip, crush-resistant hoses can be supplied in OEM colors with plain ends or screw cuffs.