Main Features: Durable and convenient, easy to operate. Chemistry organic molecule model for teaching. Scope: Suitable for J32003, J3111, J3111-T models. This set of chemical molecular structure model using a new nontoxic plastic particles of raw materials, advanced design, reasonable configuration, can be used with a stick model and scale model chemistry textbook various inorganic and organic molecules. Water, oxygen, hydrogen, hydrogen sulfide, alkanes, alkenes, alcohols, phenols, aldehydes, ketones, such as fat.