Cliplight 980 Flash Universal UV Dye Leak Detector. Flashes into refrigerant for immediate distribution. Does not contain polyolester oil and highly stable, does not crystallize with moisture. No dye injector needed and clean, no mess injection everytime. Application guidelines: 230 BTU up to 5 tons - one can, over 5 ton - two cans. 1 Can treats up to 64 ounces or 1.8 liter system oil. Vacuum packed can, net volume is 0.14 ounces or 4 milliliters. Made in the USA and re-useable hose sold separately.