Tungsten Spheres - 1 oz
Derby Monkey Tungsten Spheres measure 4.0mm in diameter, just the right size to tweak your car to 5 ounces.
1 oz. - Approx 50 spheres
Tungsten is the world's 4th heaviest metal. It weighs up to 1.8x as much as lead and over 3x the weight of the Zinc/Pewter weights. This is the perfect weight for Pinewood Derby Cars.
Tungsten is a safe non-toxic metal