Centers: 4", Length: 4 1/2", Width: 7/16", Projection: 1 3/16"Centers: 6", Length: 6 1/2", Width: 7/16", Projection: 1 3/16"Centers: 8", Length: 8 1/2", Width: 7/16", Projection: 1 3/16"Centers: 10", Length: 10 1/2", Width: 7/16", Projection: 1 3/16"Centers: 12", Length: 12 1/2", Width: 7/16", Projection: 1 3/16"Centers: 18", Length: 18 1/2", Width: 7/16", Projection: 1 3/16"Material: Brass