Balloon Birthday Card

What's a birthday without balloons?  This orange card shows the chemical structure of the subunit of latex, what balloons are typically made of. 

The perfect birthday card for your science-loving friend.

Greeting:  happy birthday
Inside:  blank
Size:  A2, 5.5 x 4.25 in (14 x 10.8 cm)
Quantity:  1 card with envelope

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