1, Independent J4512 J4520 SK30 SK40 BT30 BT40 Quick Change Tapping Collet Chucks M8 M20 for CNC is packed by plastic box. 2, J4512 J4520 SK30 SK40 BT30 BT40 Quick Change Tapping Collet Chucks M8 M20 for CNC batches are packed by carbon box. 3, Carbon boxes J4512 J4520 SK30 SK40 BT30 BT40 Quick Change Tapping Collet Chucks M8 M20 for CNC are packed by pallet, which is for shipment by sea or by air.