The RPM Standard Sprocket Hub is CNC machined from aircraft quality billet 6061 T-6 aluminum and has Steel Seal Surface that is heat treated and nickle plated which is much more durable than other aluminum choices and unique to RPM.
Includes: Steel Seal Surface, Heat Treated & Nickle Plated (X 1) Part #: EA0016 Snap Ring (x 1) Part #: B0060 Zinc Nyloc Nut, M10 x 1.5 (x 4) Part #: B0017 Flat Head CP Screw, M10 x 1.5 x 35 (x 4) Part #: B0022
