Tamiya Mini 4WD MS Chassis Counter Gear Shaft [Selected Motor Pin 13.43mm Machining] x 4 Set *Adjusted for MS Lightweight Chassis [ABS] and MS Old Chassis [ABS], both in black chassis. *This part prevents torque loss by not machining the gear shaft groove, leading to improved drive performance. *Verified with MS Flex processing. *Selected and used due to individual differences in motor pin [thickness]. *Selected gear shafts using 12 520 bearings due to individual differences in 520 bearing [hole diameter]. *Measured using a digital caliper that is the most accurate for selection. ★☆These are made by disassembling and processing Tamiya motors, so they are almost unused. *Shipped via Yu-Packet Mini. ★☆Must Read☆★ *Handmade by an amateur. *No individual sales. *No discounts. *Stored at home. *New, unused, but may have minor scratches. *Please judge the product condition from the images. *Please refrain from purchasing if you are sensitive or seek perfection. Please understand and agree to the above contents before purchasing. Thank you very much.