3" ABS Pulley with 50mm Ball Bearing and Thumbscrew prop65 supplying a finer-gauge option for

supplying a finer-gauge option for precision resistors and standard-cell construction in physics labs

illustrating the primary-battery chemistry behind the Leclanche cell — the historical predecessor of the modern dry battery

Grips burettes

Designed to grip a wide variety of optical components on standard bench rails

Four 153 x 76mm plates - each holding 98 iron-rod plotting compasses in a 14 x 7 matrix - assemble flat or as the faces of a cube to display 2D and 3D field-line patterns

3" ABS Pulley with 50mm Ball Bearing and Thumbscrew prop65 supplying a finer-gauge option forABS plastic pulley with a 50mm ball bearing wheel, a thumbscrew clamp for rod attachment, and an 18mm attachment diameter for pulling small weights in mechanical advantage experiments.