Mass dampers are an essential tuning part on circuits with elevation changes, and these are attached to the car using ball connectors. The adjusters include fiber-glass material for toughness, and the included FRP stay allows attachment of the block mass damper in a variety of positions. The 6x6x32mm block weight provides a lower center of gravity when compared with Item 94976 (hex weight version). Can be used in conjunction with other separately sold mass dampers. Compatible with AR and MA chassis Mini 4WD machines. When used with separately sold stay, compatible with MS, VS, Super-II, Super XX, Super X and Super TZ-X chassis. Please note that some chassis may require body modifications.