This is a Supply Giant baseboard tee with a cast brass construction and c x f x c ends. In particular, the tee Branches into a copper pipe with equal diameter forming an elbow with a female thread end as the straight. Furthermore, the connections are 3/4 inch x 1/8 inch x 3/4 inch in diameter for copper pipe and steel pipe sizes. In addition, this fitting is rated for a maximum pressure of 125 LB and meets the ansi B16.4 standard. ⚠ 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.