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 set includes a variety of technical building parts such as gear differentials, rack gears, pin connectors with and without friction, and train links. These accessories are ideal for MOC car construction and creative building projects. Made from eco-friendly ABS plastic, the parts offer a secure fit—neither too loose nor too tight—ensuring reliable performance and durability. The components are compatible with standard-sized building bricks from major brands. A wide selection of gears, axles, and connectors allows for use in assembling, designing, and constructing various models such as robots, cars, cranes, and engineering vehicles. Perfect for DIY enthusiasts who enjoy creating custom models or innovative designs. Suitable for children and adults interested in engineering and construction play. A great gift option for holidays and special occasions including Children's Day, Christmas, Halloween, Thanksgiving, and New Year. Color: Grey, Black, Yellow, Red, Blue (Note: The color of some parts may vary from the images shown) Material: Plastic Compatible with all major building brick brands.