Pilot Namiki CAPLESS Fountain Pen Matt Black Extra Fine Nib FC-18SR-BM-EF. Size: Maximum diameter? 13.4 mm × total length 140 mm. (1) The wrong selection of the item. (2) Reason of “I don’t like it” or “I changed my mind”. (3) Opened or unsealed items. (4) Ink flow becomes worse using ink made by other brands. International Buyers – Please Note.