This is clutch booster, its OEM number is 809-03002, it’s a normal small item, the diameter is 5”, it is used for Mitsubishi Fuso and Canter 4D34/35, it has another number 810-03101, the market for this item is Indonesia, Vietnam and so on, there will be 12pcs in one cartons when packed, the weight of one carton is about 19kgs.Clutch Booster For Mitsubishi quotation website:http://www.aydbrakebooster.com/clutch-booster/clutch-booster-for-mitsubishi/