That looks like the Genie Vortex Bowl, which is smaller and can only fit small hookahs. It wont work with medium and large hookahs. Here is a link: http://saharasmoke.com/store/catalog...l-p-17392.html
Here is a link to the normal sized vortex bowl: http://saharasmoke.com/store/catalog...l-p-17235.html
You can smoke Nakhla in the vortex bowl its just a matter of how well you pack it but I prefer the Egyptian. Also the Genie can hold 15-25g of tobacco.