Check the listing for details. Sega Master System SMS Controller Thumbstick or Dpad Upgrade Easy Install. Color: Black, Condition: Open box. Listed at 10.99 USD. Custom 3D printed parts I've designed to replace the square pad of the Sega Master System controller. These fit in place of the original plastic piece to improve the feel of the controller and give it more leverage and easier input. It's easy to install, just unscrew the controller apart, take out the old part and place the new one in. The Thumbstick replicates the feel of the miniature joystick that originally screwed into early SMS controller pads. The Sega D-Pad inserts a crosspad reminiscent of 6-button Genesis and Saturn controllers. The Smooth D-Pad has a smaller surface radius and higher position, a sort of concession between the thumbstick and Sega crosspad. Sega Master System controller is not included. Installation of the kit is the responsibility of the buyer. CONTROLLER IS NOT INCLUDED.