Ceramic Magnets with Keeper and Stamped Ends, 3" (Discontinued) Physics this three-piece acrylic equilateral prism

this three-piece acrylic equilateral prism set supports optics experiments in dispersion and wavelength separation

Fitted with a grey hand knob for tightening and a small plastic pulley

Engineered with a higher spring constant than a classic coiled novelty spring

and 38mm lens holder - an inexpensive starter platform for image-formation experiments

Ceramic Magnets with Keeper and Stamped Ends, 3" (Discontinued) Physics this three-piece acrylic equilateral prismStamped N and S ends on this 3 x 0. 5 x 0. 25 inch ceramic bar pair simplify pole identification, with a spacer and keepers in a 3. 5 x 1. 5 x 0. 625 inch cardboard storage box.