7-Piece Glass Prism and Lens Set, 13mm Thick, with Wooden Storage Heat & Thermodynamics_Pressure & Gas Laws Six-piece transparent acrylic prism and

Six-piece transparent acrylic prism and lens set with all faces polished

verifying conservation of momentum in two dimensions for mechanics-unit investigations

Enlarged mandible model exposes lower jaw teeth

Greatly enlarged four-week embryo model exposes early neural tube

Eight-inch external probe on a 36-inch cord on this handheld digital thermometer

7-Piece Glass Prism and Lens Set, 13mm Thick, with Wooden Storage Heat & Thermodynamics_Pressure & Gas Laws Six-piece transparent acrylic prism andSeven piece glass prism and lens set at 13mm thickness with all faces polished, the wooden storage box housing optical grade shapes for dispersion, refraction, and image formation work.