This is the perfect weight for Pinewood Car Derby cars. Tungsten is a highly dense material which is almost as dense as pure gold.

Tungsten is 1.7 times more dense than lead and 2.7 times as dense as zinc.

When you have a wafer thin car or are just trying to push your weight farther to the rear of the car, Tungsten is the ticket!

Each package of Derby Champ tungsten contains 1 ounce of tungsten spheres (approximately 25 spheres, 4.4 mm in diameter). They fit easily into the pre-drilled weight holes found in our blocks, wedges, and pre-cut cars. NOTE: You are buying 1 ounce of tungsten. Most pinewood car derby cars require 2 or 3 ounces of additional weight

* Tungsten is also non-toxic and environmentally friendly.