Bacharach 6600-8052 – MGS-550 Gas Detector, IP66, SC, HFO1234YF, 0-1,000 ppm

5000 ppm CO2 Calibration kit – 5,000 ppm CO2 gas, 0 ppm gas (Air). Item is HAZMAT for shipping purposes, available only in continental USA, and non-cancelable / non-returnable