Standard FeaturesType 304 stainless steelPerforated face return air grille3/16" holes on 1/4" staggered centers51% free areaCountersunk mounting holes for flush appearance with stainless sheet metal screwsMinimum size 4"x4"Maximum size 60"x48"Satin polished finishOptions (must specify when ordering)Type 316 stainless steelOpposed blade damperSquare to round transition collarT-Bar applicationTamper Proof Screws - stainless steel Torx Center PinPowder coat finish

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