Option pen for Wacom Pen 4K Wacom Intuos 4096 pen pressure level Pen has internal refills (3 standard leads) Eraser function is not included. Compatible products: CTL-4100, CTL-6100 series TCTL4100, TCTL6100 series Product composition: Wacom Pen 4K main unit, refill (3 standard cores), quick start guide, warranty regulations [Product specifications] Technology: electromagnetic induction method, side switch: 2, pressure level: 4096 level, no tilt detection function.