What size?

This particular item is ¾” FHT (Female Hose Thread) x ¾” MHT (or Male Hose Thread), and should fit a standard hose faucet, or hose end connections. If you need a pipe threaded version instead, we also sell a ¾” FPT (Female Pipe Thread) x ¾” MPT (Male Pipe Thread) version. Please feel free contact our Support team at 1-800-488-6156 with any and all questions you may have. Thanks!