This is a replacement Yokomo 4mm Spacer Shim Set, and is intended for use with the Yokomo BD7 1/10 touring car. These shims feature a 4mm inner diameter, and 6.5mm outer diameter. Includes: (20) 4x0.13mm Spacer (20) 4x0.25mm Spacer (20) 4x0.50mm Spacer