1. 20mm thick strong plywood cases as regular size stained glass's packing. 2. There is a thick corrugated paper between two sheets 3. There are 20mm thick plyfoams on two sides of cases and 10mm thick plyfoams on bottom of cases. 4. The four corners of cases are nailed by iron. 5. Every two cases are wrapped together by iron-plastic belts. 6. There are 72sheets/ 54sq.m per case. 7. 1.1m*0.4m*1m in measure, 375kg in net weight and 400kg in gross weight per case.