Tamiya Mini 4WD Counter Gear Shaft for ME Chassis [Selected Motor Pin 13.64mm Machining] x 4 Set Adjusted for ME Chassis [ABS Resin] Black Chassis * This part prevents torque loss by not machining the gear shaft groove, leading to improved drive performance. * Selected motor pins are used due to variations in motor pin thickness. * Selected gear shafts are used with 12 x 520 bearings due to variations in 520 bearing hole diameters. * A digital caliper, the most accurate available, is used for measurement. ★☆ These are made by disassembling and modifying 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 and unused, but may have minor scratches. * Please judge the product condition from the images. * Please refrain from purchasing if you are sensitive to imperfections or seek perfection. Please understand and agree to the above before purchasing. Thank you very much.