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. 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. Contains: (Qty.) (1) Injection Gun, (1) Fluorescent Light, (1) Fluorescent Leak Detection Dye, (1) Fluorescent Dye Cleaner, (1) UV Glasses, (1) Blow Molded Case.