Anvil® 8700139507 Pipe Cut Length, Black, 1/2" x 72"Pipe length with a black finish and male National Pipe Taper (NPT) threads on both ends for joining two pipes or extending pipe length. NPT threads for creating a tighter seal than straight threads. Black finish to provide greater rust resistance than iron and can be used for oil and gas applications. Measures: 1 2" x 72" Black finish National pipe threads for creating tighter seals than straight threads Made in USA.