US$ 99.95
75-inch plastic base
Pan balance demonstration lever with a low-friction brass pivot
Plated spring arm with press knob and a single contact stud
suitable for securing tubes and flask necks in general laboratory assemblies
cellular organization
Polarizing Filter Stress Demonstration Apparatus Gifts 75-inch plastic baseBuilt to reveal stress fringes in transparent solids, this apparatus pairs two 8 inch polarizing filters in a wooden frame with four acrylic shapes that show photoelastic patterns when squeezed.