... pursuit Size1/2" to 24"(Seamless Pipe Fittings) ,24" to 48"(Seam pipe fittings)Wall ThicknessSCH5S-XXSMaterialCarbon Steel (ASTM A234 WPB/WPC etc), ... Stainless Steel (304,304L,316,316L), Alloy Steel (P5,P11,P22 ... are made upon the ISO9001 strickContator person: Joy 86-15922276377 high quality steel pipe caps