The CCM 2k pump kit is built for that super smooth feel. The stainless steel main guide rod has been redesigned to eliminate the aluminum guide nut. A 3/16 hex has been milled into the end of the main guide rod for installation purposes. The main guide rod, short stabilizing rod and pump arm are made of hand polished stainless steel, not anodized aluminum. This fits year 2000 and older autococker bodies. CCM products carry a LifeTime Workmanship Warranty. This warranty applies only to the original purchaser and is NON-TRANSFERABLE. This warranty does not apply to items that have been abused, misused, modified or repaired.