Double Parallel Pulley with 2" Wheels Item Type_Dissection Equipment this two-wire potentiometer mounts on

this two-wire potentiometer mounts on a metal base for stability during extended laboratory measurements

One hundred numbered slots in a hardwood storage box hold standard microscope slides for ordered reference and classroom slide-library organization

Long-format 150 x 15 x 10mm Alnico bar pair with keepers

using a 5cm sphere with detachable hemispherical cups that lift away to test for residual charge

25 inch diameter

Double Parallel Pulley with 2" Wheels Item Type_Dissection Equipment this two-wire potentiometer mounts onAluminum bodied double parallel pulley with two 2 inch wheels in a heavy duty 4. 25 inch metal frame and end hooks, demonstrating compound pulley mechanical advantage in paired configuration.