This is a Supply Giant left/right nipple fitting with on one end standard right handed thread and on the other hand thread in the reverse Direction. It is made of steel and has a black coating for improved its durability. The nipple is 4 inch long and has a 1 inch nominal pipe size diameter. The fitting meets all applicable ansi and ASTM standards. ⚠ California Proposition 65 Warning: This product is known to the state of California to cause cancer, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.