The three brass plates in the new Yokomo multi-weight plate set for the BD9 touring car are intended to maximize left-to-right weight balance. They can be fitted in the electronics area or the battery compartment depending on whether you're using heavy batteries or light electronics. Each plate is 7g in weight and 25x34x1mm in size. A set of thin double-sided tape is provided to guarantee the least amount of height gain. The set, which is made for the BD9, works with the majority of other electric touring car kits.