PSP Mid-Size Flat Top - Brown Swirl Ebonite, Chrome Trim, Extra Fine JoWo Nib Beautiful brown and black swirled ebonite (hard rubber). Large, high quality German nib in extra fine, made by JoWo. These pens take international style cartridges and converters. Ships with converter in a Peyton Street Pens gift box. Length is 5-13/16", width at the barrel's threads is 12.1mm, weight (w/o ink) is 20 grams.