Mass dampers are a common upgrade for Mini 4WD cars. They add stability by helping to absorb impacts after a jump. This short mass damper version parts set offers a shorter alternative to the otherwise longer 32mm block set. They measure 8x8x14mm giving greater flexibility to your setup. - 6x6x14mm brass Mass Damper Block x2 - Small parts for attachment are included. - Each block weighs approximately 6.6g. - Compatible with MA, FM-A and AR chassis cars. - Can be attached in lower positions. - Can be secured firmly to the chassis or allowed to move on the attaching screws for different effects.