These Motion Pro off-road throttle sleeves are heavy-duty and exceed the quality and durability of OEM sleeves. These throttle sleeves replace your factory OEM and will not scar bars like aluminum sleeves. These Motion Pro off-road throttle sleeves are a one-piece design with nylon fabric composite material for long-lasting and great durability. These throttle sleeves include molded ridges to help secure grips, and some models have pop-out end caps for use with bar-end-type hand guards