 Okay, so now we have here some pieces of some little cylindrical flasks that you have here which besides actually the very high-skill production, you know, of for instance the U-wares and all the big vessels and so on, you have a lot of diverse little objects, little vessels and things like that carved in rock crystal as well during the Islamic period. So what is very interesting with the cylindrical flask is when I showed you the other day the tubular drill used to hollowed out for the first operation of following out of for instance a U-wares, you have a bore core which forms, you know, inside the tubular drill. You remember the little cylindrical thing I showed you. So this is, it's hypothetical but in theory this is possible that this bore core was reused letter to make these cylindrical flasks. And first they use the grinding wheel with abrasives and water to shape the main relief of the decoration. That means that they are going to grind here and here and everything here to have the rough relief, you know, what we call the eyelets of relief, right, which then proud of the surface. And then they are going to use all the cutting disks in copper or other soft metal with abrasive powder, so corandum for instance, to carve the lines and the decoration like the little spiral here. You see? And all the lines, the curved were all made using the copper, not copper but I think copper but mainly the abrasive. And the inside of course was also made using the tubular drill, a smaller tubular drill and at the bottom you can see. Oh yeah. And I think this is that one that we found residues stuck, you know, at the bottom so we analyzed them with XRF at Cronfield University and well, we expected to find the abrasive powders and then to have been, you know, the way to finally find what was the abrasive, but actually they probably, as I suspect, that what they found was residues of cosmetics. Okay, yeah, because these were perfume and coal and probably, yeah, probably, but there were, there were, there was no systematic studies about it. Okay. And so maybe for another occasion. So then they finished to carve the decoration and first using all the tools I told you and at the end of the process they finally polish everything.