FREE SHIPPING!! Our 5/16 American Mech Speargun Shafts come with 3 shark fin loading tabs up to 62 inches. The 65 inch shafts and longer come with 4 shark fin loading tabs. Choose from single flopper or double configurations. These 17-4 Stainless Steel Shafts are the finest quality shafts being produced and are the OEM shaft of choice fo