This ester-based polyurethane self-storing air hose is lightweight, elastic & flexible. It has excellent recoil memory, very high abrasion resistance & very high kink resistance. Reusable brass fittings are reliable, leak-proof & resistant to loosening caused by vibration. The brass fitting at the 4” end of the supply side of the hose is 360-degree swivel for a superior directional flexibility. The 20” end on the use side of the hose improves vibration resistance for a secure connection & its 20” length makes it ergonomic in use.