The Robinair UV Leak Detection Kit, No. 16235, helps technicians find A/C system leaks. The gun requires no guesswork, because it injects a pre-measured application every time. One squeeze of the gun’s trigger injects a pre-measure amount (1/8 oz) of dye. The dye performs among the brightest dyes in the industry, exceeding all industry performance standards, according to the company. The UV light can detect UV dyes up to 50’ away. The kit meets SAE J2297 standard for use with both R-134a and R-1234yf refrigerants.