FB4CPB Concrete Pour Box for FB4-XLRF Made by Atlas Sound. This Pour Box has been designed for use with Atlas Sound's FB4-XLRF 4 outlet floor box. It will be used when the FB4-XLRF needs to be flush mounted in concrete or masonry floor.
Four compound combination knockouts (1/2"-3/4" ), 16gu Construction, and guarantees durability. Unpainted finish