This SF8-JNC3 EMT Fitting Adapter Accessory for the 8" Fire-Rated Poke-Thru from FSR is fitted with one 2" stub.
The SmartFit 8" series of floor boxes combines flexible options via recessed mounting bracketry and various subplates such as this SF8-JNC3, to accommodate a wide assortment of power, data and audio connection options.