Wunder-Bar O-Ring Insertion Tool for Soda GunsThe Wunder Bar O Ring Insertion Tool is a specialized service instrument designed for the professional rebuild of commercial soda bar guns. This tool allows technicians to precisely seat small internal O rings (such as those on brix screws and shut off valves) without nicking or tearing the rubber. Using the correct insertion tool ensures a 100% pressure tight seal and prevents the mechanical stress that leads to slow syrup leaks. A must have for