4-Gas Calibration Gas - CH4 - O2 - H2S - CO - FX116-155-5300(0)No Reviews yet $188.50 Quantity discounts available QuantityPrice SKU: FX116-155-5300 Quantity -+ Add to Cart Details 4 Gas Calibration Gas - CH4 (2.5%), O2 (18.0%), H2S (25 ppm), CO (100 ppm), 116L Bottle. Details Back Details4 Gas Calibration Gas - CH4 (2.5%), O2 (18.0%), H2S (25 ppm), CO (100 ppm), 116L Bottle. Reviews 0 Back Ratings & ReviewsNo reviews availableBe the first to Write a Review