PineCar Tungsten Putty is a moldable weighting material for pinewood derby cars, sold in a 1 oz. (28.4g) quantity. Tungsten is a dense metal, making it effective for adding weight in small, precise amounts without occupying much space in the car body. The putty form allows builders to shape and position the weight as needed to fine-tune their car's balance and meet race weight requirements. Features: 1 oz. (28.4g) net weight Moldable tungsten putty for easy shaping and placement High-density material adds weight in a compact footprint Suitable for pinewood derby car weight tuning 7/7/26 cs