The Tracerline model TP-3822 Tracer-Charge system adds fluorescent dyes into automotive air conditioning systems with a single charge. This simplifies the whole dye injection process. There’s nothing to measure, pour or spill, and each aerosol can of Fluor-Lite/P fluorescent dye contains enough fluid to test one vehicle. The product is the only solvent-free dye which meets or exceeds SAE refrigerant leak detection standards, and is used and approved by major vehicle manufacturers worldwide. Contact: Tracer Products, P.O. Box 10324, Dept. 189, Westbury, NY 11590.