Thin enough to double sided tape or glue to the bottom of your pinewood derby car and NOT hit the track.
16 grams/ in
Flexable cubes shipped on 1/2 in wide 3M VHB tape ready to place on your car.
Easy to cut apart for fine tuning.
Suggest covering with metal tape after taping in place to reduce wind friction and put a slope transition to weights for a better stop.