Jolly bulb metal - superior, Palm-sized, hollow metallic ball with a manometer connected to it for demonstrating change of pressure in a closed volume of air when heated or cooled, 80 mm diameter
Boyle'S Law Apparatus, 27in In Total Height, Powder Coated Metal Base, High Quality Pressure Gauge With An 8in Braided Nylon Flexible Hose For The Supplied Hand Pump, Includes: (1) Apparatus, (1) Pump,(1) Braided Hose, (2) Bottles Of Mineral Oil, (1) Ppe Funnel