Square Cover. Plaster Ring, Mud Ring | 4 11/16 in Square, 2 in Raised Single Device Tile Cover | 7 in Length X 1.26 in Width X 4.51 in Height, 17/32 in Dia Hole, for Rigid Conduit and Imc | Use Through Knockout to Connect Box to Conduit Coupling; Use With a Locknut to Connect Two Boxes Side by Side or Back to Back; Use With a Locknut to Connect Fixture Housings in Continuous Runs; Rigid Conduit Threads (Nps)Furbay Electric Supp