It'll be the Senzhen warehouse where the domestic seller sends the items. You just have to do your best to estimate the weight from whatever sources there are out on the Internet. They might limit your options to DHL or EMS to get thru customs. That disclaimer comes up with these types of items because the superbuy warehouse inspects all items and they don't know whether something is a KO or not. They will take pictures of all the items once it gets to the warehouse.