Hinge Kits Fits Square Base Size 40 in Compatible Grainger Part Number 56JN96 Material Galvanized Steel Includes Curb Cap Brace (2) Curb Cap Hinge (2) Hinge Brace (2) Draw Latch (2) Hardware Package Hinge Plate (2) For Fan Type Downblast Fans Upblast Fans For Fan Mounting Type Roof and Wall Mount Container Capacity Not Applicable Standards AMCA NFPA 96 UL 762 For Use With Belt Drive Exhaust Fan Centrifugal Upblast Direct