Robinair's No. 16242 Tracker Universal A/C Fluorescent Dye 12 Pack features twelve 1/4 oz bottles for a total of 12 dye applications. Tracker flourescent dye is the brightest dye in the industry and exceeds all industry performance standards. Compatible with all materials found in a vehicle's A/C system, this solvent-free formula is OEM backed and approved. It also meets the new SAE J2297 standard for use with both R134A and R1234YF, and is REACH and CLP compliant. Robinair, a Bosch Automotive Service Solutions brand, is a global leader in service tools and equipment based in Owatonna, Minnesota. Robinair is recognized throughout the world as the quality and performance leader in AC/R evacuation tools and this position has led to its success with the full range of products that serve the heating/ventilating/air conditioning/refrigeration (HVAC-R) and mobile markets, which includes the automotive aftermarket along with other industries such as agriculture and construction.