564 thick gray cardboard sheets products are offered for sale by suppliers on Alibaba.com, of which paper & paperboards accounts for 87%.
A wide variety of thick gray cardboard sheets options are available to you, such as craft, clothing and shoe.You can also choose from waterproof, recyclable and eco-friendly thick gray cardboard sheets,as well as from wood pulp, mixed pulp, and bamboo pulp thick gray cardboard sheets,and whether thick gray cardboard sheets is coated, or uncoated.