Sealed ABEC 1 + rated radial ball bearing Low friction, high wear resistance, internal polymer bushing Delrin thermoplastic cam pulleys match OEM/stock pull ratio CNC machined 6061 T-6 aluminum throttle tube and bearing insert Grip area knurled for maximum grip adhesion Replaceable end cap provides damage protection and seals out debris Additional O-ring set included for large I.D. bars For use with stock throttle housing-No modifications required Will not fit RenthalĀ« 36 Fatbar. THROTTLE TUBE ELITE