343-Piece Giant Molecular Model Set, 99 Atoms Science at Home_General Science Supplies 88 inches long by 0

88 inches long by 0

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

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

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

Ninety-five-piece molecular model set with 53 atoms and 42 links spanning organic and inorganic chemistry

343-Piece Giant Molecular Model Set, 99 Atoms Science at Home_General Science Supplies 88 inches long by 0Whole 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.