This I purchased from New Dimension, for $15. He sent the left side and I had to return and wait for correct version right side, with added return costs, plus a postage due return. Guy who runs the business seems a bit off the track or does not care much about customer service. This throttle fits standard bars and can be adjusted to hold speed by tightening the piece in the middle of red circle in pic. Good for long rides, no doubt. Item is new and it has a click type thumb pressure piece. I will sell for $9 plus $4 for insured shipping, with full return for reimbursement of the $13 scoots, if not satisfied.