Pulley, Single Sheave, Pulleys wheels are made of plastic and mounted securely in an aluminum housing with a hook on both the top and bottom for suspension, Size: 50mm
Basic Plotting Compass, 16mm, Glass Face, Aluminum Case, Diameter: 0.6 In. (1.3Cm), One Individual Unit, Provide A Simple, Teachable Way To Demonstrate Magnetic Fields In Class. Simple Use And Easy Readability Make It Straight-Forward For Students To Map Magnetic Fields