CylindersEnvironmental Protection Testing Exhaust Gas Analyzer Pre filter Polymer Filter Paper Pre filter1: 10 white polymer filter cartridges2: 50 white polymer filter cartridges3: 100 white polymer filter cartridges4: 10 yellow paper filter cartridges5: 50 yellow paper filter cartridges6: 100 yellow paper filter cartridges==========High-concerned chemical : NoneElectronic : NoDIY Supplies : Electrical Cylinders Environmental Protection Testing Exhaust Gas Analyzer Pre filter Polymer Filter Paper Pre filter Item Weight 1.76 ounces Manufacturer XIJQKTWT Item model number XIJQKTWT Batteries required No Package Dimensions 0.39 x 0.39 x 0.39 inches