The Robinair 16235 is the easiest and most accurate gun available today. No guesswork means a pre-measured application every time. One squeeze injects a pre-measured amount (1/8 oz.) of dye. No more adding too much dye. The brightest dyes in the industry, exceeds all industry performance standards. Most powerful light in its class, it fluoresces dye from up to 50ft away. OEM backed and approved and meets the new SAE J2297 standard for use with both R134A and R1234YF. Kit includes: Injection gun, fluorescent light, fluorescent leak detection dye, fluorescent dye cleaner, UV glasses, and blow molded case.