Basic Starter Laboratory Hand Tool Set Diameter_250mm Long-focal double-convex glass lens at

Long-focal double-convex glass lens at 75mm diameter and 500mm focal length

Chrome-plated 60mm reading magnifier extending to a 20cm focal length

Reproduces Ewald von Kleist's 1745 charge-storage device with concentric metal cups around a plastic dielectric

sized to fill the gap between 100-ohm and 1k values for fine-grained voltage-divider investigations

10-inch vacuum pump plate on an aluminum base with a stopcock and rubber seal

Basic Starter Laboratory Hand Tool Set Diameter_250mm Long-focal double-convex glass lens atEssential hand tool starter set for laboratory work, bundling the fundamental manual tools needed for introductory science in one convenient classroom or hobbyist package.