What do you mean by single and double holes in the carton?
The physical indicators can not meet your requirements. I have seen the best of the box is made of seven layers of cardboard, that is when the board with the corrugated board in the core of AAA, three layers of paper are 330 grams of imported dogs, 280 grams of high-strength corrugated corrugated paper.
That is, five ply corrugated cardboard. Corrugated carton can not say what is the best material, but to see whether it is applicable
Single pit refers to a corrugated cardboard, that is, three layers of cardboard, double pit refers to two corrugated cardboard
