4-Piece Aluminum Equal Mass Multi-Shape Set

This set of four aluminum shapes demonstrates that the shape of an object can affect its volume but not its mass. All four pieces — sphere (32mm diameter), square (25.4mm per side), rectangle (50 x 34 x 10mm), and triangle (83-67-50mm sides, 10mm thick) — possess the same 45g mass. The set comes in a hinged plastic storage box measuring 5.25" L x 3.6" W x 1.4" H. Designed as a visual and tactile tool for physical science students studying the relationship between mass, volume, and density.