Common size:1-16mm(+-0.02mm) Material:soda lime round glass balls Itemperformance/ingredientvalue 1sio272% 2na2o15% 3cao9% 4specific gravity2.6-2.8g/cm3 Common size:1.588-101mm(+-0.0001mm) Material:borosilicate glass ball Density:2.2 gm/cm Continuous operating temperature :450â°f Price will be offered based on different quantity and size, should you have need in ball, please feel free to email us your