This is a Supply Giant Adapter fitting with on one end a female soldering cup, and on the other end a female threaded connect. In particular, the female solder cup has a nominal diameter of 3/4 inch and is suitable for use with copper pipes with an outer diameter of 7/8. Furthermore, the threaded female end has a nominal diameter of 3/4 inch and is suitable for use with pipes with the same nominal pipe size. Furthermore, this part is produced to meet all applicable 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.