The RF500 is 3" adjustable floor box with three 3.5" knockouts: one on bottom, one on each side, non-metallic sheathed cable clamps on each side. The box is made of steel for height adjustment after installation.
3" adjustable floor box
Steel construction
Recessed receptacle design
Minimizes plug protrusion allowing furniture to be located over the plug
Pre-assembled flange and cover for fast installation