UEi Test Instruments C20KIT Combustion Meter Kit C20 Set up meter includes flue probe, protective boot with magnet, soft carrying case, 4 AA batteries and EM151 Pressure meter Replaces wet chemical kits, Performs safety checks, Measure CO and CO2 and maximum CO levels Includes probe with 10 inch stainless steel shaft and nominal 36 inch neoprene hose and EM151 pressure meter measures pressure