Ring and Ball Apparatus with Stand Glass Bottles_BOD Bottles Nine-piece flat brass weight set

Nine-piece flat brass weight set with dual hooks on each piece

Shows oxygenated and deoxygenated blood paths between heart chambers and alveolar surfaces through seven hand-painted removable parts designed with medical-professional input

Demonstrates electromagnetic switching on a base with 4mm plug connections

Combining filtration and titration on one base

fabricated from glass tubing 6 mm bore

Ring and Ball Apparatus with Stand Glass Bottles_BOD Bottles Nine-piece flat brass weight setStand mounted ring and ball thermal expansion apparatus, dropping freely through the ring when cool but stopped by the ring once flame heating expands the ball.