116 pcs Technical Gears Axle Pin Connectors - Wheels Connectors Rack Gear Car Building Brick Accessories Pieces Sets Compatible with Mindstorms Building Bricks Block Technical Toys (116 TECH Parts) This listing packing including variety technical parts. Like Gear Differential Rack Gear, pin connector with/without friction, train link, Various accessories can be widely applied to MOC Car construction and creation. ECO friendly ABS materials use. Brick parts or gear connection is good, neither loose nor tight, great quality. Technical parts are compatible with standard sized bricks from other Major s. Variety of gears axle parts etc, can be applied to a substitute for assembly, designing and building your project, like models of robots, cars, cranes, engineering vehicles, and etc Variety technical parts suit for DIY a creative model or create a new design, a great addition do your model stuff. This is great parts for kids or adult who love play building engineer project. Great gift of festivals and holidays (Children's Day, Christmas, Halloween, Thanksgiving & New Years). new and high quality. Color: Grey, Black, Yellow, Red, Blue (The color of some parts will be different from the picture) Material: Plastic Fit for all major brands.