Highside Chemicals 23032 Mid-Temp Gas Leak Detector (32oz trigger sprayer bottle). • Nonhazardous nontoxic—does not contain ethylene glycol. • Nonfreezing viscous fluorescent bubble-type gas-leak detector. • Leaks appear as large strong bubbles that cling to surface are fluorescent under black light. • For use on hot cold piping on equipment containing most gases—air natural gas all refrigerants (R-12 R-134A R-22 R-502 etc.) ammonia sulfur dioxide etc. • Rated to 27°F. • 32oz trigger sprayer bottle. • Sold as 1 Each.