Anvil® 8700127551 90-Degree Street Elbow, 2", BlackNPT threads for creating tighter seals than straight threads. Made of malleable iron for use in gas, oil, and water applications. Black finish that helps resist rust in oil and gas applications. 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. 2"