This is the Aspire Nautilus X 2ml/4ml Glass Tube, it is built with high quality and fitting for the Aspire Nautilus X Atomizer perfectly. If you are looking for the replacement glass tube for this tank, this is the perfect. The price is for 3pcs with free shipping, and you can also add 2usd for another 3pcs. We also provide free shipping. Don't miss the great deal.