The CCM Pump Kit is made specifically for Mid/Half Block Black Magic Pump Markers. The stainless steel main rod is 3.570" and 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 secondary guide rod is 2.870" and the pump arm is 7.640". This pump arm is not drilled for AT. All of the rods are hand polished stainless steel and also comes with a pump return spring. 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.