Lens Set with Supports, 42mm Diameter Biology_Microscopy providing the cleanest hand-operated way

providing the cleanest hand-operated way to make and break a circuit during early electricity instruction with stackable modules

Premium gyroscope and gimbal cradle on a wooden base

Aepinus capacitor with adjustable plates demonstrates electrostatic principles

digestive cavity

Lamp-house assembly dimensioned as the matched replacement unit for optical bench and light-source apparatus when the original housing reaches end of life

Lens Set with Supports, 42mm Diameter Biology_Microscopy providing the cleanest hand-operated wayLens set at 42mm diameter shipped with matching wooden supports, the fixed mounts steadying each lens for repeatable refraction and image formation experiments at student station scale.