Scuba Choice Scuba Adaptor M-1/2-20 to F-3/8-24 AS568-013 N70 | 1/2-20 UNF-2A | 3/8-24 UNF-2B M-1/2-20 to F-3/8-24 AS568-013 N70 | 1/2-20 UNF-2A | 3/8-24 UNF-2B Stainless steel Material: Stainless Steel