Certified Calibration Gas, 17L bottle, 500 ppm R448A, Balanced in AirQuantity*Get QuoteProduct DescriptionCertified Calibration Gas, 17L bottle, 500 ppm R448A, Balanced in Air, R-32/R-125/R-134a/R-1234ze/R-1234yf (26/26/21/7/20) in Air
