Architectural Lattice Grilles 1307-44x28 past 12 months 3 cone steel diffuser with

3 cone steel diffuser with hinged core for easy duct access

Nylon bushings for easy adjustment and quiet setting of blades running parallel to shortest dimension

Louvers designed with rolled rib for maximum strength and rigidity

53% free area * 1306: 3/4" lattice opening

904 - Double Deflection Adjustable Aluminum Blade Grille For a 22" x 18" Duct Opening (front blades parallel to shortest dimension)

Architectural Lattice Grilles 1307-44x28 past 12 months 3 cone steel diffuser withStandard 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 *