Heavy gauge steel construction
904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 20" Duct Opening (front blades parallel to shortest dimension)
Nylon bushings on adjustable blades prevent metal on metal rattle
Spiral Diffuser Radius Flush Mount Diffuser Single Deflection with Damper
Holds up to 1" filter (not included)
Architectural Lattice Grilles 1307-10x46 past 12 months Heavy gauge steel constructionStandard Features * 1" rim size (2" larger than nominal duct size) * 14 gauge steel * 1305: 1 2" lattice opening, 3 16" cross bars, 53% free area * 1306: 3 4" lattice opening, 1 4" cross bars, 57% free area * 1307: 13 16" lattice opening, 3 16? cross bars, 69% free area * 1308: 7 8" lattice opening, 1 4" cross bars, 60% free area * Soft White Options * Countersunk screwholes with matching Phillips #8 x 1 1 2" oval Screws * 10 or 12 gauge steel *