
Thick Grey Cardboard Sheets for Secure Product Packaging. Customizable Thickness: Thickness ranges from 0.35mm to 5mm to meet specific requirements. Customizable Dimensions: Sheet size width 600mm-1213mm and length 550mm-1300mm. Moisture Proof & Anti-Curl: Features excellent moisture resistance and deformation prevention. Multiple Certifications: Passed ISO9001, ISO14001, ISO45001, SGS, and RHOS certifications. Recycled Material: Made from mixed pulp and recycled materials for sustainability. Versatile Applications: Suitable for puzzles, gift boxes, book covers, and furniture panels. Factory Direct Sales: Direct sales from a Dongguan factory with nearly 10 years experience. Free Sample Availability: Free samples provided; buyer only needs to cover express delivery.