The ZOOM L104 multifunction pen combines a blue ballpoint pen, a red ballpoint pen and a 0.5mm pencil along with a capacitive screen stylus for your phone or tablet with a replaceable eraser beneath. It is made chiefly from aluminium so it is light in the hand. The barrel diameter is approx. 9mm. The function selection is via a twist mechanism - you twist the cap to select each function in turn. The stylus part at the top of the cap can be unscrewed to reveal a pencil eraser. This pen will accept standard D1 multipen refills. See below.