The Decimo is the same nib unit as the regular Capless, but with a narrower barrel. This barrel often provides a more comfortable grip for small to medium hands.Also known as the Vanishing Point, the nib is retractable and operated single handedly by a push button. When not in use, the nib is neatly stored behind a shutter system that prevents the nib from leaking or drying out.The nib is 18ct gold. Available in Extra Fine, Fine or Medium (which are narrower than European pens). PILOT Capless works well with proprietary PILOT IC-50 cartridges (inserted into a protective metal sleeve) or with a twist Con-40 converter and bottled ink. Works particularly well with PILOT Iroshizuku ink. Both the sleeve and the converter are included with the pen.A clip at the writing end means that when you store the pen in your pocket it will be stored in the correct orientation with the nib up.