X AUTOHAUX Motor shaft sleeve adapter step key kit 3/4 inch to 1 inch replacement : Amazon.de: Automotive
5mm-14mm Motor Shaft Coupler Reducing Sleeve Connector Rod | Shopee Philippines
3Pack ShareGoo Metal 3.17mm to 5mm Shaft Adapter Change-Over Motor Axle Sleeve Compatible with Hobbywing HSP 540 550 EZRUN-3656 Motor RC Car Boat Plane