Looking for a new sleeve for your ZOLO Thrustbuster? Look no further. To replace the sleeve, follow these simple steps: Remove the cover cap Turn the lock wheel towards ON side to unlock Push the transparent cover backwards to open and take out the transparent cover Press down the lock and take out the stroker Rotate the middle circle counterclockwise to remove Take out the sleeve Insert and rotate the circle and press the lock down to insert the new sleeve Take the transparent cover and turn the lock wheel towards off to lock