Penny Weight Set

thingiverse

This text describes weights designed for a back-to-school balance scale available at http://www.thingiverse.com/thing:152531. The weights can be filled with pennies (minted post-1982) to equal 20g, 40g, 50g, 100g, 200g, 400g, or 500g. Each penny weighs 2.5g, so you'll need 200 pennies for the 500g weight. Additional scale parts are also included in the design.