1/8" Tungsten Cubes, 50 Pcs (.90 oz to 1 Oz Total)
These are great for fine refinements to get the derby car to 5 oz.
Tungsten is about 1.7 times heavier than lead and 3.2 times heavier than the no-lead weight often used on pinewood derby cars. It is non toxic.
95% Tungsten
3.5% Nickel
1.5% Iron