It is a brand new replacement joystick knob & gaiter used on most joystick contollers
All size view the pictures please.
Note: Disassembly of the joystick using basic hand tools is required for installation of the boot.
This knob & gaiter will fit on a variety of joysticks, if yours compares to the pictures shown it will fit. These knobs & gaiter are used on the following wheelchair joysticks