For upgrades, replacements, and custom Monster Valve™ air-up solutions, this is the Monster Chuck with no other fittings or valves. The current Monster Chucks are nickel plated for a shiny finish and are open, letting air pass through, whether it is on a Monster Valve™ or not. This means you'll need some other way to control the air flow while you're moving from Monster Valve™ to Monster Valve™.
The open Monster Chuck does not trap pressure like the older closed chucks making it much easier to seat on your Monster Valve™. This Monster Chuck is compatible with all generations of Monster Valve™.
