AUKUYEE Plastic Gear Set, 75Pcs Single Double Reduction Gear Worm Gear for DIY Car Robot QY12 auspowers_batchfive especially the blue adapter is

especially the blue adapter is a little like silver

It is used to display advertising price tag

HYS BNC Base 15

Protalk XLS TK Series: TK-2000/3000

AUKUYEE Plastic Gear Set, 75Pcs Single Double Reduction Gear Worm Gear for DIY Car Robot QY12 auspowers_batchfive especially the blue adapter isAUKUYEE Plastic Gear Set, 75Pcs Single Double Reduction Gear Worm Gear for DIY Car Robot QY12 Product Features 100% Brand new and high quality. Material: Plastic. Quantity: 75pcs 75 kinds of parts and accessories in just one package, which makes it a perfect choice for laboratories, science education, and DIY models. The plastic includes crown gear, single gear, double gear, worm gear, belts and other transmission parts. And all the display pictures