Zinc Brick Weight for LEGO(R) Derby Car Racing (set of 2) from Pinewood Pro LEGO Brick made of Zinc to add weight to a LEGO Car so it can be raced down a pinewood derby track. Designed for flexibility so you can place weight anywhere on your LEGO Derby Car Each 2x2 LEGO Zinc Brick weighs approximately 0.44oz Can be used on pinewood derby car with LEGO base plate material safe, non-toxic