Beach RC says... This is a package of 8 anodized M3 Aluminum Servo Washers from Ultimate Racing and are intended for use with any servo. Gain more secure servo mounting with these aluminum servo washers. They preserve the structural integrity of the servo ears. Lightweight and great looking, these washers are the perfect finishing touch for your R/C car. Available in six different anodized colors: blue, orange, black, purple, pink and red.