Dear sir Hi. We are a silica producing company in Iran with ability of providingâ Sio2 99%+â in different sizes as below: 0 -0.2 0.2 - 0.7 0.7 - 3 3 - 5 5 - 8 8 - 12 12-18 If you are in need of silica -any kind of it- weâll be glad to hear from you. We can provide as much as you want. Best regards Reza Aghajani Sales Manager of Khoy Momtaz Silica.