Nylon bushings on adjustable blades to prevent metal on metal rattle
2" ADC compliant round collar with a bead for ease of installation
Recessed screwdriver operated opposed blade damper to control air volume for positive balance of system
Standard Features * Use in applications for installing round without damper * Steel galvaneal construction
Spiral pipe diameter must be 4” larger than the width of the grille
Architectural Lattice Grilles 1307-46x30 Finish:DarkBronze Nylon bushings on adjustable bladesStandard 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 *