Air Grille Vent Register - Three Way Lanced - Steel - Heavy Duty - 6 x 4" (measures approx.  7 3/4 x 5 3/4" on the front & 5 5/8" x 3 3/4 on the back opening). For use on walls and ceilings.  High quality, includes open/close lever and 2 - 2" mounting screws. Made by Venti Air Products Corp. Please note: Black marker writing info is on the plastic cover, not on the vent.