1、Easily build the molecular structure of most common and slightly complicated methane (CH4), ethane (H3C-CH3), fat, amino acid and most other organic compounds 2、Can build stick model and scale model at the same time, very convenient 3、Made of environmentally friendly plastic, very safe and not broken with long service life 4、The model can further increase students' interest in learning, and the teacher can also explain more intuitively 5、Suitable for basic chemistry and specialty chemistry, secondary and university teaching, and laboratory use 54 x Atom model70 x Link Key1 x Key Opening Tool Item Type: Molecular Model Kit SetSpecification: 54 x Atom model, 70 x link key, 1 x key opening tool