Check the listing for details. PART: Google Nest Learning Thermostat Wire Base: Fits ALL 3rd Generation Kits. Condition: Open box. Listed at 74.95 USD. Google / Nest 3rd Thermostat Wiring Base. Works with all Google / Nest 3rd Generation thermostats and all colors. Free and quick shipping. Works with the following Google / Nest 3rd Gen Thermostat Models:T3007ES is 3rd Generation, stainless steelT3008US is 3rd Generation, stainless steel, pro packageT3016US is 3rd Generation - blackT3017US is 3rd Generation - whiteT3018US is 3rd Generation - mirror blackT3019US is 3rd Generation - polished steelT3021US is 3rd Generation - copperT3032US is 3rd generation - brassThermostat Model A0013This part is NOT compatible with "Thermostat E" or Nest 1st or 2nd Gen models which take different types of wiring bases and for sale at other listings. Google / Nest 3rd Learning Thermostat Wiring Base part will arrive in sealed protective packaging and professionally repackaged in a plain box to ensure safe transport. Discount provided since Wiring Base may have come from a store return or have minor cosmetic blemish(es) from previous handling and/or installation that do not impact functionality and cannot be sold as New.STORE SKU: NEWNEST3RDBASE