Combustion Efficiency Analyzer, Easy to Use Analyzer Designed Not Only To Display and Calculate The Required Readings From a Flue But Also to Cover Most of The Other Measurements Associated With Combustion, Your TPI 709 Flue Gas Analyzer Comes with The Following Accessories:TPI 709 Instrument, Rubber Boot (A765), Soft Carrying Case (A768), Flue Sampling Probe (A770), In-Line Filter Assembly Installed on Flue Probe (A796), Temperature Probe (GK11M), Mini Pump Protection Filter Assembly And Spare Filters (A763), Exhaust Spigot (Removable) (A764), Instruction Manual, Weight:5 Lbs 12oz, In Box, Made in USA/Canada.