Comparison : Item # 1317-64-600, 1/8" FPT Union Malleable Iron Galvanized Class 150
Item # 1317-64-601, 1/4" FPT Union Malleable Iron Galvanized Class 150
Item # 1317-64-602, 3/8" FPT Union Malleable Iron Galvanized Class 150
Item # 1317-64-603, 1/2" FPT Union Malleable Iron Galvanized Class 150
Item # 1317-64-604, 3/4" FPT Union Malleable Iron Galvanized Class 150