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
