cochranes Unit Large Demonstration Set - Plastic Bonds

Product Code : SCL-CLE-12762

Quick Answer: The cochranes Unit Large Demonstration Set - Plastic Bonds is a large molecular model kit for demonstrating molecular shapes to a whole class. It contains 70 atom spheres with bonding pegs and 90 plastic bonds.

Last updated: October 2026

Key Features

• Large 44mm diameter spheres in seven colours to represent different atoms
• 25mm diameter white spheres to represent hydrogen atoms
• Pegs allow any bond angle, joined with flexible bonds
• Bonds and atoms to scale at 8.5cm per 100pm
• Structures can be seen from the back of the class
• Contains 70 atom spheres with bonding pegs and 90 plastic bonds

Technical Specifications

About This Product

This demonstration set is used to build large molecular models that show rotating single bonds and non-rotating double and triple bonds, structural isomers, ring structures, the chair-boat flip of cyclohexane and VSEPR theory. Models of hydrocarbons, alcohols, amines, organic and inorganic acids and bases, carbohydrates, benzene, chlorinated molecules and inorganic molecules can be produced.

Frequently Asked Questions

What does the set contain?

The set contains 70 atom spheres with bonding pegs and 90 plastic bonds.

Are the models to scale?

Yes. Bonds and atoms are to scale at 8.5cm per 100pm.

Can double and triple bonds be shown?

Yes. The kit shows rotating single bonds and non-rotating double and triple bonds.

Related: Chemistry Lab Equipment, Shapes of Molecules- Electron repulsion theory, Molymod Molecular Orbital Organic Structures Set.

For a quotation on the cochranes Unit Large Demonstration Set - Plastic Bonds, contact School Lab China.