This is the Stock Replacement Fuel Primer Pump for the Monster GT. This primer bulb is used to prime to engine with fuel to aid starting. FEATURES: Blue silicone construction YOU WILL RECEIVE: One primer pump Two zip ties REQUIREMENTS: Nothing. This is a direct replacement part. SPECIFICATIONS: Length: 56mm (2.2") Diameter of bulb: 17mm (0.67") cmc 10/29/03 &