Collapsible Metal Can Demonstration Kit with Vacuum Pump Activity Kits_Physics Lightweight equilateral acrylic refraction prism

Lightweight equilateral acrylic refraction prism with polished triangular faces

the wide aperture and longer focal distance suiting whole-page reading and broader image-formation experiments

Diatom model displays the silica frustule architecture and intricate valve patterning characteristic of these unicellular algae for aquatic biology teaching

Nested through six graduated diameters and supplied with a steel ram rod

Collapsible Metal Can Demonstration Kit with Vacuum Pump Activity Kits_Physics Lightweight equilateral acrylic refraction prismFull collapsible can kit with a metal can, handheld vacuum pump, stopper, and hose fitting, demonstrating atmospheric pressure as the can implodes under evacuation.