Malleable iron. Flat banded. Standard Malleable Iron Fittings, Fed. Spec. WW-P-521F, ANSI B-16.3 (Dimensions), ANSI B-2.1 (Pipe Threads), ASTM A-197 (Chemical & Physical Properties). Size: 1/2 In. x 3/8 In. Angle: 90 Deg. Material: Malleable Iron Type: Reducing Finish: Galvanized