The ANTIDOWN QUARK antiparticle of the Down Quark. Purchase an Antidown Quark along with an Up Quark and make a Pion!
Also part of the Antiquark 6-pack and Antiparticle 14-pack.
Approximately 2 oz (57 gm); 3 inches (6 cm) across.
For ages 5 and up as it contains glued-on/small parts.
CATEGORY: ANTIPARTICLES > ANTI-QUARKS