Manufactured to double flare aluminium and copper tubing up to .040″ wall thickness producing SAE 45? flares. Heat treated alloy steel swivel is precision ground and chromed to reduce friction. Heat treated drop forged yoke. Each adaptor is clearly stamped with the size for easy identification. Bright lustre plate finish with contrasting black oxide. Will also produce a single flare. | Sizes: 3/16″, 1/4″, 5/16″, 3/8″, 7/16″, 1/2″, and 5/8″.