Technical requirements document templateLouver Flange Kit Length 44-1/2 In. Width 44-1/2 In. Height 1-1/2 In. Material Extruded Aluminum For Use With Aluminum Combination Louver Dampers And Drainable Fixed Louvers Includes Mounting Hardware Construction noise bylaw richmond hill1-800.850.6467 Monday - Friday 8AM - 5PM Eastern Time [email protected] 516.569.3333 (fax) 71 Inip Drive Inwood, NY 11096