Rubber ball main type: silicone ball, silicone rubber balls, sponge rubber ball, solid rubber balls, small rubber balls, hard rubber balls, soft rubber ball, nbr rubber ball, viton rubber ball. Rubber balls size: 3.2mm, 4.8mm, 5.5mm, 6.35mm, 6.5mm, 7.14mm, 8.0mm, 8.5mm, 9.52mm, 10.5mm, 27mm, 32mm, 48mm, 63mm, 70mm, 80mm to120mm. Rubber balls uses in astronautics, the automobile, the drugs manufacture, the valve, pump, the bathroom, the electron, the electric appliance, and so on industry. Rubber ball material: nbr, silicone, viton, hnbr, cr, ptfe, epdm. We maintain quality production equipment and mold in our company, we supply various rubber balls. 100