Plano-Cylindrical Lens, +10 Diopter State_Solid holding twelve tubes up to

holding twelve tubes up to 22 mm diameter for classroom and professional bench setups

sized for stringing through small pulley systems or hanging pendulum bobs across multiple demonstration setups

Aluminum strip testing clamp with wing-nut fixing

Handmade wooden spice rack holds twelve 6-inch borosilicate glass test tubes with caps and includes a filling funnel for kitchen-to-lab cross-over gifting

uniform heat conduction through the walls

Plano-Cylindrical Lens, +10 Diopter State_Solid holding twelve tubes up toPairs a 50 by 50mm plano cylindrical glass lens with +10 diopter optical power, focusing light along a single axis for astigmatism correction, line focus, and cylindrical optics demos.