This is the tip for the S20 mechanical pencil. These can sometimes break, so I am offering this as a replacement. I bought a stationery store's closing sale grab bag, and it had quite a lot of items. I can't use them all myself, so I'm listing them to pass them on to those who need them. - Brand: PILOT - Model: For S20 - Size: 0.5mm - Quantity: Set of 2 Thank you for looking.