Nylon and molybdenum disulphide composition; 1.438 in. Lg; 1.246 in. Min 1.250 in. Max w; 0.880 in. Min 0.882 in. Max h; concave arc 0.625 in. Radius by 0.281 in. Dp one side; four blind mtg holes 0.166 in. Diameter by 0.438 in. Dp; one hole in end 0.625 in. Diameter by 0.562 in. Dp