silica powder specification details : 1.Application: Electrode Grade (Superfine) ; Can be modified ; 2. Mesh: 1000-3000M; 1250M;1500M;2000M;(Ordinary Specifications ) 3. Whiteness: > 90 ( At your option ) silica powder size: Other requirement of chemical composition and size are available. Silica Powder Packaging & Shipping: 1.Packing : 25kg/bag ,then 1000kg/bag . 20-25mt/1x20 container . we can pack it according your need too. 2. Delivery : It is not dangerous goods , can be delivered just as ordinary goods . About Production standard and manage system: 1.production SJ/T 10675-2002. 2.ISO9001:2008< Quality Management System certification>. 3.ISO14001:2004< Environmental management system certification>.