Thank you for viewing! This item is a Mitsubishi Pencil mechanical pencil, the Return's, 0.5mm, in green. This mechanical pencil is now discontinued. It's a rare mechanical pencil that features a mechanism not often seen today: the lead extends when the knock button is pressed lightly, and retracts when pressed firmly. I think it's a pen with a sophisticated design and mechanism. It has been on display in a store for a long time. Operation has been confirmed. Eraser is included. Mitsubishi Pencil Return's Model number: M5-318 .6 Color: Green With piston mechanism This is a discontinued pen, no longer in production. A rare 0.3mm model is also on sale. #Shiro'sStationery We also offer combined sales. Thank you for your understanding. Thank you very much. m(_ _)m Type...Mechanical pencil body Lead/Darkness...HB Body material...Plastic