Anvil 8700126355 45 Elbow, 1-1/2", Black Finish (2-PACK) Class 150 malleable iron pipe fitting with female National Pipe Taper (NPT) threads on both ends to connect and change the flow direction between two male pipes. NPT threads for creating a tighter seal than straight threads. Made of malleable iron for use with gas, oil, and water applications, and has a black finish that helps resist rust in oil and gas applications. 1-1/2" Black finish 45 Class 150 fitting meets standards ASTM A-197, ASME B 1.20.1, and ASME B 16.3 for quality assurance Class is a standard relating to tolerance, construction, dimension, and wall thickness, but it is not a direct measurement of maximum working pressure Made in USA.