Alu adjustable ball differential for M18 enables you to fine-tune the handling faculties of this presently great-handling micro racecar. Includes duraluminum hardcoated dual-slotted manufacturing shafts, screw for external modification, heavy-duty diff washers, and top-notch steel diff balls. Differential is very built by the factory as well as the diff may be used at front or right back of M18.