... , After cutting, grinding, polishing, milling,Tempered and so on process to complete. This company produces steel of 3.3 borosilicate glass ... ,8.0,10.0,12.0,15.0,20.0,25.0 mm thickness, etc., the maximum size of 2000mm × 750mm ... , the minimum size of 20mm diameter Resistance to bending strengthnot less than 1100Kgf/cm ²Temperature resistance:long working ...