The Ball Bearing 6001 C3 is a genuine Hitachi/Hikoki replacement part designed for handheld petrol machinery such as brushcutters, blowers and hedge trimmers.The standard 6001 size measures 12 mm inner diameter x 28 mm outer diameter x 8 mm width, with C3 internal clearance to cope with heat and higher speeds. It is commonly used in Hitachi and Hikoki machines including the CG27ECP ,TCG24EC.