Quick Answer: The Unit Large Demonstration Set - Plastic Bonds is a large molecular model kit with 70 atom spheres and 90 plastic bonds, sized so that structures can be seen from the back of the class.
Last updated: October 2026
Key Features
70 atom spheres with bonding pegs and 90 plastic bonds
44 mm spheres in seven colours, plus a 25 mm white sphere for hydrogen
Sturdy pegs allow any bond angle
Shows rotating single bonds and non-rotating double and triple bonds
Bonds and atoms to scale at 8.5 cm per 100 pm
Durable plastic parts that are easy to build and take apart
Technical Specifications
Specification
Value
Atom spheres
70
Bonds
90 plastic bonds
Sphere diameter
44 mm, seven colours
Hydrogen sphere
25 mm, white
Scale
8.5 cm per 100 pm
User
Teacher
About This Product
Teachers can build hydrocarbons, alcohols, amines, acids and bases, benzene and inorganic molecules, and show structural isomers, ring structures and the chair-boat flip of cyclohexane. Supplementary atoms, bonds and orbitals are available. Besides buyers across India, the Unit Large Demonstration Set - Plastic Bonds can be exported to institutions in Burkina Faso, Armenia, Rwanda, Montenegro, Democratic Republic of the Congo and Luxembourg.
Frequently Asked Questions
Q1. What scale are the models built to? Bonds and atoms are to scale at 8.5 cm per 100 pm.
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