The MagnaFlow 387-01-5920-48 SK-816 SPOTCHECK KIT(2 SKL-SP2 SKD-S2/4 SKC-S) is a two-sensor, color, spot check kit that includes a MagnaFlow 387-01-5920-48 SK-816 SPOTCHECK KIT(2 SKL-SP2 SKD-S2/4 SKC-S) sensor and a MagnaFlow 387-01-5920-48 SK-816 SPOTCHECK KIT(2 SKL-SP2 SKD-S2/4 SKC-S) reader. The MagnaFlow 387-01-5920-48 SK-816 SPOTCHECK KIT(2 SKL-SP2 SKD-S2/4 SKC-S) sensor is a two-sensor, color, spot check sensor that can be used to detect the presence of liquid or gas in a confined space. The MagnaFlow 387-01-5920-48 SK-816 SPOTCHECK KIT(2 SKL-SP2 SKD-S2/4 SKC-S) reader is a two-sensor, color, spot check reader that can be used to read the presence of liquid or gas in a confined space.