Michael's Fat Boy

Michael’s Fat Boy is an American maker of elaborate wide barrel fountain, ballpoint, and rollerball pens. Their fountain pens take a standard short or long international ink cartridge or screw in piston converter. Their ballpoint pens ship with genuine Parker G2 refills but can be refilled with any Parker style G2 refill. Their rollerball pens use the Schmidt long capless 8126 refill.