Prime-Line Roller Assembly, Number of Rollers: 1, Bearing Type: Ball, Roller Edge Type: Concave, Roller Width: 5/16 in, Roller Diameter: 1-1/2 in, Steel, K-Tab Mounting, Dimensions: 2-3/8 in L x 3/4 in W x 1-1/2 in H, Suitable for: Doormaster and Other Glass Doors