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My original digital drawing of our beloved horseshoe crab stating what we all should know - that they're in a ton of our vaccines and medications, helping us to know if they're clean and safe. Thank the humble horseshoe crab, and their blood, for keeping us healthy. 


Listing is for one, 1" pin or magnet. 


All metal button parts, made in the U.S.A.

Horseshoe Crab In Your Blood Pin or Magnet

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