Painstakingly made from a solid rod of acrylic. The insides have to be sanded and polished as well as the outside. These pens are very light, weighing in at around 16g without the cap. It will be fitted with a JoWo nib in either extra fine, fine medium or broad and stock stub nibs in 1.1 and 1.5mm. It comes with a quality ink converter and all packaged in a nice branded box.