These are the RJ Speed 1/4" ID Rear Axle Shims. FEATURES: Plastic construction, 1/4" (6.5mm) diameter INCLUDES: Two 0.24" (6.2mm) thick Washers Three 0.059" (1.5mm) thick Washers Five 0.0035" (0.9mm) thick Washers jxs 01/03/12 ir/jxs