Mini 4WD Product Aluminum Spacer Set (12/6.7/6/3/1.5mm, 2pcs. each) (Gold) Item No: 95442 ★This set includes two each of 5 different length spacers, in stylish gold color anodized aluminum. ★Great for adjusting setup of rollers, rear stay, brake, etc. ★Diameter: 4mm (outer); 2.1mm (inner) Compatible CarsAll Mini 4WD and Mini 4WD PRO Chassis cars Information is current as of January 10, 2019. Specifications are subject to change without notice.