Aoshima Techni 4WD Mini 4WD Yonku Majin Oshou Set of 14 items. These are high-magnetic-force, high-RPM motors released by Aoshima Bunka Kyozai. They are higher performance than Tamiya motors. This item is unopened. Since it is unopened, the operation is unconfirmed and it is unknown whether it works. Yonku Majin's RPM is 72,000rpm Oushou is 62,000 Even Tamiya's fastest Plasma Dash motor has 28,000rpm, so these will be quite fast. Due to the high RPM, please be careful of heat generation, injuries, and damage due to course-outs. Due to the high-magnetic-force motor, it may not work unless you use new batteries or fully charged rechargeable batteries. (The manufacturer recommends Ni-Cd batteries) The boxes have storage-related damage, such as wear and warping. Please understand that this is a used item stored at home. I was organizing my parents' house and found a large number of motors that I had collected a long time ago. I think they are quite rare now. No individual sales. First come, first served. Please also check my profile. Tamiya TAMIYA Aoshima Bunka Kyozai Aoshima Mini 4WD Techni 4WD Fence Car Plastic Model Model Toy Toy Toy