Retractable pencil graphite 777. construction consisting of a cartridge Adjustable, retractable mechanism. Barrel Material: Rubber Shaft. Eraser. Clip. Shaft: range of colours. LEAD WIDTH: 0.5. Hardness: HB. Packaging and contents: 1 x Graphite mechanical pencil and 1 x Mars micro carbon 250 mechanical pencil leads (Pack Packaged on a blister card.