FOUNTAIN PEN Ranga Ebonite Model 3S Fountain Pen - Slender Flat Top, German Nibs, Cartridge/Converter $72.00 Type Fountain pen handmade of Indian ebonite (hard rubber) ... this version of the pen has a screw-in German nib unit. Product Name Model 3S aka "Duofold" with flat tops and flat bottom. This is the slender version of the popular... Choose Options