Horeshoe Crab Folded Cards - 5 Pack

This card features illustrations of the miraculous horseshoe crab, a creature older than the dinosaurs. The medical industry also loves horseshoe crabs for their astounding blue blood which can detect toxins. (Public pressure to use a synthetic version rather than drain them of blood like vampires has helped their population a bit.) These high quality paper cards come pre-folded and include a white envelope for each card. Works well with regular ballpoint pens after short drying time. Blank inside.