There is a " stretch/Skrink Wrap " under Outbound Packaging fee，under which situation OC will use this packing？If we use stretch/Skrink Wrap will the fulfilment fee be cheaper? Will stretch/Shrink ...

OC will only use the stretch wrap when outbound order has been created and there is a lack of suitable packing material in the WH, it will help to protect the items during transportation. Seller can't delegate stretch wrap as assigned packing material.