Upper Triple Root Molar Model with Caries, 15X Enlarged, 2-Part Pack Size_100 tightened with an Allen wrench

tightened with an Allen wrench for constructing lattice frameworks on laboratory benches

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

Optically-worked glass double convex lens with a 150mm focal length and 1

polished with ground edges for image-formation experiments in introductory optics

an ignition light firing on compression for visual timing

Upper Triple Root Molar Model with Caries, 15X Enlarged, 2-Part Pack Size_100 tightened with an Allen wrenchFifteen times enlarged molar shows progressive caries decay through enamel and dentin into the pulp chamber, supporting dental hygiene and pathology teaching.