These are replacement ShockBlocks for Matrix II and Matrix II Pro trucks. They are available in soft (yellow), medium (orange) and hard – (red). These blocks control how much resistance is offered by the trucks. Go softer if you like carving or harder for speed.
Sold as a set of 4 – enough for 1 complete board.
Matrix II trucks come fitted with yellow ShockBlocks
Matrix II Pro trucks come fitted with orange ShockBlocks