Anvil® 8700163101 Black Pipe Union, 1-1/4", Malleable IronFemale National Pipe Taper (NPT) threads for connecting two pipes. It has three pieces and includes a threaded connection that can be screwed or unscrewed to connect or disconnect pipes more easily than couplings. This union has NPT threads on both ends for creating tighter seals than straight threads. 1 1 4" Made of malleable iron High tensile strength Black finish that resists rust in oil and gas applications Class 150 fitting meets standards ASTM A