Air Grille Vent Register - Four Way Lanced - Steel - Heavy Duty - 6 x 6 " (measures approx.  7 3/4 x 7 3/4" on the front & 5 1/2" x 5 1/2" 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. Also pic shows 8 x 8 but listing is for 6 x 6 air grille vent register.