Malleable iron. Each fitting is individually flag tagged. Import. Mueller logo cast into body of each fitting. 100% inspected and quality tested. All fittings meet the following specifications: material: ansi/ASTM a-197 dimensions: ansi/asme b.15.3, B16.14, B16.39. Threads: ansi B1.20.1.Product is manufactured in china. This product meets customer requirement.