I'm a bit arthritic and wanted an easy to handle and assemble molecules. These are durable pieces, hard plastic atomic nucleus and flexible bonds. The use of short, medium and long bonds reflect accurate bond distances. Grey flexible double bond pieces round out a great teaching and learning aid. Such a value I bought two.
Verified purchase: Yes | Condition: New
Very pleased. Thank you so much.
Verified purchase: Yes | Condition: Pre-owned
Verified purchase: Yes | Condition: Pre-owned
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