"Supply Giant plug of malleable iron, with a Black coating, for terminating pipe ends in applications with a maximum pressure of 150 Lbs. Its male threaded interface has a nominal diameter of 3 inch and it has a square head for tightening and loosening. Furthermore, the fitting, which was produced in a certified Iso9001:2000 ENVIRONMENT, was pressure tested before leaving the facility. In addition, UL/ulc and FM approved the part for meeting the ansi/asme B16.3 and B16.14 and astm a-197 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.