EF / F / M / B nibs The Mini now comes with Aluminum Parts! Roughly 1 inch shorter than a Diamond 580 fountain pen. (4.66 in closed) Piston filler type fountain pen. Comes with a small vial of silicone grease and a wrench for disassembly. Go see in the 'Specifications' section below the PDF file to view the difference of size between the Diamond Mini AL and the Diamond 580.