Gauge cylinder leakage tester set includes a M14 short thread adapter on a 26 inch hose assembly, a M14 long thread solid adapter and a 1/4 inch female x 1/8 inch male reducer adapter. The new design incorporates a round, anodized body with permanent laser etching for a sleeker appearance. A new industrial interchange quick coupler allows use with most standard compression test adapters on the market (some adapters require removal of the valve core). The new larger, easier to read leakage gauge has one multi-colored band for measuring low, moderate and high leakage, and a scale range from 0 to 100 percent with a redesigned gauge boot for added protection. A new larger, easier to read pressure gauge has a dual scale dial with ranges from 0-100 PSI and 0-7 bar with a redesigned gauge boot for added protection.