>> Surface material: Optional felt, hessian, mesh fabric;
>> Core panel: Cardboard;
>> Backing material: Optional zinc galvanized steel sheet, PVC/PP corrugated, or dry-erase writing surface (double-faced);
>> Frame: Aluminum alloy sections with ABS corners;
>> Standard size: 30× 40cm, 30× 45cm, 35× 50cm, 40× 60cm, 45× 60cm, 60× 90cm, 70× 100cm, 80× 120cm, 90× 120cm, 90× 150cm, 90× 180cm, 100× 150cm, 100× 200cm, 120× 150cm, 120× 180cm, 120× 240cm, 120× 400cm, and customized service available.