Air Grille Vent Register - Three Way Lanced - Steel - Heavy Duty - 10 x 4" (measures approx.  11 3/4 x 5 3/4" on the front & 9 1/2" 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.