These are off a KLE500. I had bought the brackets as they came with the rack which was the same size for the GPX. Still have the rack but undecided if I keep them as I may get another GPX for a commuter. These are the brackets only, no hardware/bolts/screws, and no rack. $20 and they're yours. Happy to post out if need be, or pick up is fine. Whether they're specific to a particular year/model of the KLE, I'm not sure.