This Triple prism is a brand new and durable one. It is used to research the
refraction and dispersion of the light， and make a thorough inquiry of
the forming of the rainbow. 

A good present for children!
Buy it now， and let your children enjoy the fun of light!

Specifications:

Prism Length: 1.97inch / 5cm

Side Length: 1.18 inch / 3cm

Material: optical glass， not plastic

Package Included:

1 x 5cm Triple Prism + 1 Decent Gift Box