Kaweco Sport PISTON FILLER (without bottled ink)Piston Filler timeless elegance meets the highest level of craftsmanship. The Kaweco Sport Piston Filler is one of the smallest in relation to size and ink volume. This is possible due to its clever and compact mechanism. The iconic pocket sized fountain pen only measures 10. 5 cm when closed and grows to an average size of 13 cm with the cap attached. Thanks to the small size, the pen is ideal for on the go and ensures a long and pleasant writing