343-Piece Giant Molecular Model Set, 99 Atoms Science at Home_General Science Supplies For restoring secure access to

For restoring secure access to the UV sanitization chamber after a key is lost

Rod-mounted full-size skeleton pairs bare bone on one side with painted muscle origins and insertions on the other for skeletal and myology teaching

the lower-friction variant of the metal-bearing bench-clamp pulley in the series

producing a smaller flame footprint suited to individual student work on crowded benches

4A single-phase rheostat with cover-protected constantan winding on a 200x56mm tube and 4mm safety socket terminals

343-Piece Giant Molecular Model Set, 99 Atoms Science at Home_General Science Supplies For restoring secure access toWhole class visible giant molecular model set with 99 atoms 1 2 inches in diameter and 343 total pieces including double bond, turning, and connector links for back of the room demonstrations.