many our competitors only use PE TARPAULIN to parcel the products. But we, firstly use carton box, and then use PE TARPAULIN outside. What's more, a key point of package is the iron pallet with wheels under the pack. It makes the loading and unloading easy and convenient so that we get the national patent for it. Except that, the dunnage air bag is available to protect package from lurch and breach during long distance transportation..