Product details:

This 2-gang, flush rectangular, nonmetallic floor box helps to satisfy a variety of office, retail, and commercial applications. It features PVC construction.Concrete Floorboxes, Flush, 2-Gang Rectangular PVC Box, 3.00" Minimum Depth of Pour.
Non-corrosive plastic construction.
Parallel conduit hubs reduce labor and material cost.
Concrete cover, conduit reducers and conduit hub plugs included.
PVC Construction; PVC Conduit Reducers and Closure Plugs Included; Removable Low Voltage Dividers Included.