This is a case for Mini 4WD cars made with a 3D printer. It was ultimately completed as the PTC series, but what is being offered this time is a collection of prototypes (Part 6) from the design phase, where various molding conditions were tried and tested. These are being offered together at a bargain price, so please consider using them if you're interested. ・The details of the final product differ slightly, but the basic aspects are the same, and they can be used without any problems. ・The filament used is PETG carbon fiber. ・The color is black. ・Refer to the PTC series, which is listed separately, for the basic specifications. 　Small item case 4 (2 pieces) ⇒ PTC1 　Battery case (holds 16 batteries, 1 piece) ⇒ PTC3 ・As these are prototypes, there may be some localized defects. Please check the photos for the specifications and condition. Since these were made with a 3D printer, there are individual differences such as layer lines and localized unevenness. Those who are extremely sensitive to the appearance are kindly requested not to bid. Returns and support are not available. Please understand this before bidding.