Recessed Prewired Surface Style Poke-Thru Assembly – Designed to Be Installed In A Concrete Floor Which Has Access In The Ceiling Of The Floor Below For Running Power, Data and A/V Services. Poke-Thru Device Installs Into A 6" (152MM) to A 6 1/8" (155MM) Diameter Hole. The Unit Comes Complete With A Surface Style Cover and Two (2) Prewired, Pre-Installed Duplex Receptacles That Are Recessed 4" (102MM) Below The Floor Surface Level. Surface Style Cover Is An Aluminum Cover That Is Designed to Sit On Top Of