The MONO Graph Mechanical Pencil from Tombow features an innovative shaker mechanism that advances the lead when you shake the pencil back and forth. Pressing on the pocket clip will also advance the lead.The pencil has a extra-strong fixed lead pipe that is 3.7mm long with a 0.5mm lead in pink marshmallow and a replaceable twist-advance eraser at the end of the pencil.Features & Benefits Includes 1 MONO Graph Mechanical Pencil Shake back and forth to advance the lead Extra-strong fixed lead pipe Features replaceable twist-advance eraser Specification Colour: Pink Marshmallow