- Female x female threaded ends.- Approved by American Gas Association Labratories Certificates.- Capacity: 1/2" 301,800, 3/4" 788,000 BTU/Hr.- Tested under standards ANSI Z21.15b "Manually operated gas valves for appliances, appliance connector valves and hose end valves."- Rated 32°F to 125°F, 1/2 PSIG gas