【Product Name】: Blue Box 3A American Crystal Ball 【Product Specification】: 57.2mm/2-1/4 [Uses]: American gameplay, 16 -color, Chinese black eight, fancy nine balls 【Material】: resin+high -dense powder 【Product advantages】: Blue Box 3A American style Crystal balls are made of resin, which are good at elastic, bright luster, and high durability, and they respond quickly during the impact.