Robinair 16234 UV Leak Detection Kit The easiest and most accurate gun available today No guesswork - a pre-measured application every time; One squeeze injects a pre-measure amount (1/8 oz.) of dye No more adding too much dye; Brightest dyes in the industry, exceeds all industry performance standards OEM backed and approved; Meets the new SAE J2297 standard for use with both R134A and R1234YF Kit includes: Injection gun; Fluorescent leak detection dye