... .Size:16mm,19mm,22mm,24mm Solid Rubber Ball for Industry (not inflatable):1. Size: φ16mm, φ19mm, φ22mm, φ24mm, φ26mm, 28mm,32mm ... , Tan, Transparent5. Density: 0.93g/cm36. Hardness: 30~100Sh°A7. Working Temperature: -55~100°C8. Good Heat-Resistant Property9. Vitrification Temperature ... details, please view our website! Solid Rubber Ball for Industry (not inflatable)