Meets the new SAE J2297 standard for use with both R134A and R1234YF The 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 standards Most powerful light in its class. Fluoresces dye from up to 50ft away. OEM backed and approved Includes: Injection gun Fluorescent light Fluorescent leak detection dye Fluorescent dye cleaner UV glasses, Blow molded case .