... 4.Material:Stainless steel 5.Size:1/8"-4" Forged fittings 1/8"-4" TypeSteel reducer bushing stainless steel bushing carbon steel bushingthickness2000Lbs, 3000Lbs,6000Lbs ... 97, MSS-SP-79,JIS B2316materialCarbon steel(ASTM A234WPB,,A234WPC,A420WPL6. 20#,Q235,ect)Stainless steel(ASTM A403 WP304,304L,316,316L ... ,321.,ect)Alloy steel(ASTM A234 WP12,WP11,WP22,WP5,WP9,WP91,ect) ...