RKI Instruments 03 Series H2S Cylinder. ? ? ? SKU;? RKI01-81-0151RK-04 ? Product Weight (lbs.);? 5.0 ? Ship Weight (lbs.);? 5.5000 ? Brand;? RKI Instruments ? MPN;? 81-0151RK-04 ? UPC;? No ? BW Sensor;? No ? BW Parts;? No ? Accessory;? Calibration ? Color;? No ? ? ? ? ? ? ?