Antidown Quark

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