National Hardware Narrow Hinge, 20 lb Weight, Door Leaf Width: 2-1/2 in, Door Leaf Thickness: 0.056 in, Frame Leaf Width: 2-1/2 in, Frame Leaf Thickness: 0.056 in, Number of Knuckles: 5, Pin Type: Removable, Loose, Pin Diameter: 0.128 in, Full Mortise Mounting, Number of Mounting Holes: 6, Mounting Hole Diameter: 0.218 in, Hole Spacing: 1 in, Cold Rolled Steel, Zinc, Dimensions: 1-11/16 in L x 2-1/2 in W