Teacher Inorganic and Organic Chemistry Molecular Model Set, 101-Piece Subject_Biology Triple tandem plastic pulley with

Triple tandem plastic pulley with 25/38/50mm ball-bearing wheels on an open-sided 17

this metal wave helix demonstrates pulse propagation

Jumbo-sized for heavier apparatus

Double-concave glass lens at 3-inch diameter and 200mm diverging focal length

exposing the full urinary tract for combined anatomy and physiology teaching at 15 by 9 inches

Teacher Inorganic and Organic Chemistry Molecular Model Set, 101-Piece Subject_Biology Triple tandem plastic pulley with101 piece teacher grade molecular model set with 51 atoms and 50 bonds covering carbon, hydrogen, oxygen, nitrogen, halogens, sulphur, and phosphorus for organic chemistry work.