GA24XT- M Gas Alertclip Extreme – CO Description Description Range 0 – 500 PPM 24 Month life Water-resistant Built-in concussion-proof boot Related products MCXL-XWHM-Y-NA BW Gas Alert Microclip XL 58L-421 – CALIBRATION GAS 58L BWC2-H510 Gas Alertclip Extreme – H2S BWC2-S24 Gasalertclip Extreme – SO2