RKI Calibration Gas Cylinder, H2S 25 ppm / CO 50 ppm / HEX 15% LEL / O2 12% in N2, 34AL by RKI Industries Cylinder, H2S 25 ppm / CO 50 ppm / HEX 15% LEL / O2 12% in N2, 34AL (cylinders for RKI Instruments, 4 GAS).
SKU: T-RKI-81-0155RK-04