Syncwire iPhone USB Car Charger – Upgrade 4.8A24W Car Charging Adapter with Built-in Coiled

Locks on, does not leak
1/8″ NPT compatible with all grease guns – battery, pneumatic, manual
Grease goes in, not on, the machine
World’s original locking grease coupler.
World’s only rebuildable grease coupler. Lowest lifetime cost.