Base Ball cartridge roller pen. Nib material: with ball end Type of ink cartridge: Roller cartridge 852, royal blue. Shaft material: Plastic. Style of gripping zone: Ergonomically rubberised. Style of clip: Plastic, assorted. Each cartridge has a new tip for ever new writing comfort. Style of spring: Rollerball tip. Colour of pen shaft: assorted. Format of the contents with packaging: 1er Blisterpack assorted with 2 ink cartridges.