Single Pulley with 1 Hook, Aluminum Frame, 3.5 x 2" LabLearner Extended two-inch fingers on this

Extended two-inch fingers on this vinyl-coated three-finger clamp provide deeper reach into apparatus assemblies

LED-output photoelectric cell on a 3

NPN transistor in a protective enclosure with labeled base

verifying the Boolean disjunction operation by direct observation

the largest value in the demonstrator line for slow RC charging and high-energy capacitor-discharge work

Single Pulley with 1 Hook, Aluminum Frame, 3.5 x 2" LabLearner Extended two-inch fingers on thisAluminum bodied single pulley in a 3. 5 by 2 inch metal frame with a centered 2 inch wheel and one hook, sized to suspend from a stand for mechanical advantage experiments.