... products. 1) We are specialize in producing plastic balls. Hollow plastic ball diameter10mm100mm, are mainly used in the ... mainly used in the industry of bearing.2) Plastic balls are made of different materials, such as PP ... ,35.2mm,35.56mmPE,PPCosmetic packagingGlass roll on bottle10ml,25ml,30ml,40ml,45ml,50ml,75ml, ... forward to receiving your order! 9mm plastic balls roll on bottles