Grade Up Parts Series No. 473 Aluminum Spacer Set (12/6.7/6/3/1.5mm) Item No: 15473 ★Spacers are useful in a variety of roles on your Mini 4WD machine, as they can be employed in rollers, the rear stay, adjusting the brake height and so on. ★This set features 5 different sizes of durable aluminum spacer from 1.5-12mm. The information on this page is current as of January 20, 2014. Specifications are subject to change without notice.