Meets the new SAE J2297 standard for use with both R134A and R1234YFThe easiest and most accurate gun available today.No guesswork – a pre-measured application every time.One squeeze injects a pre-measured amount (1/8 oz.) of dye. No more adding too much dye.Brightest dyes in the industry, exceeds all industry performance standardsMost powerful light in its class. Fluoresces dye from up to 50ft away.OEM backed and approvedKit includes: Injection gun, fluorescent light, fluorescent leak detection dye, fluorescent dye cleaner, UV glasses, and blow molded case