Power Flow 3 Air Hose Coupler. This newly designed air tool fitting has superseded the Power Flow 2 with thermal vents to alleviate lower temperatures from the Power Tank regulator. The Power Flow 3 still has eight locking balls to secure a standard 1/4" plug and has a max pressure of 400 PSI.
The special seals are rated at -40°F and they're automatic in that it only requires one hand to push and lock the plug into place. To release, simply pull back the sleeve. Made with aircraft aluminum with a hard anodized black body and red sleeve finish, the Power Flow III is durable and light weight.