Eaton Hansen D-series compression swivel nut hose clamp. It is reusable. Made of brass. Brass male swivel insert. External seat inverted flare for use with paint spray and oxygen fittings, etc. will accept 37 degree or 45 degree flare. Thread size: 9/16"-18 straight thread. 3/8-inches hose inner diameter, 11/16-inches hose outer diameter.