Hartley's Optical Disc Physics_Alternative Energy 5-inch mounting rod giving 5

5-inch mounting rod giving 5 inches total length for standard optical-bench setups

Sturdy wooden pulley simple-machine model with multiple pulleys mounted in series and parallel

Mounted on a small motor with banana-plug sockets on a plastic baseplate

Primary-level electricity kit for six students with connecting leads

Thirty-two-inch advanced pulley demonstration set with 8 singles

Hartley's Optical Disc Physics_Alternative Energy 5-inch mounting rod giving 5Stand mounted 230mm rotatable disc with 360 degree graduations and built in light source, supplied with prism, lens, slab, and screen accessories for a full reflection and refraction sequence.