What's the packing case for the pull case?
The tie case packing strap is used to prevent the zipper from breaking suddenly and to tie a strap in the middle.
When the plane is packed with stuff too much afraid of preventing inflation seems too large package will be packed with it in tight or worry about when installed under the machine cracked or burst because the staff is not threw his bag down slowly
Tie the tie bar box to prevent shipment on the way