1)roll on ball with holder 2)8mm,10mm,19.05mm,25.4mm,29mm,35.2mm,35.56mm roll on ball with holder are available 1) We are specialize in producing plastic balls. Hollow plastic ball diameter10mm100mm, are mainly used in the cosmetic packaging, sewage disposal, and for floating. Solid ball diameter 1mm--60mm, mainly used in the industry of bearing.2) Plastic balls are made of different materials, ...