Hubbell Wiring Device-Kellems ScrubShield™ SystemOne™ Poke-Through, Flush Recessed Standard Sized, 4 in Hole, (1) 3/4 in EMT for Power, (2) 1/2 in EMT for Low Voltage Capacity, Fire Rated Device, For Use With: In-Floor Delivery Systems and Concrete Floors, 4 in Dia x 8.09 in L