ITEM NAME:Kids Technology Science Educational Toys DIY Crown Fan Shape Gear Wheel 81Pc Description: - 81Pieces of gear can match each other, all combined into gears, these gears are suitable for shaft - Including pindle gear, Crown gear, Fan shape Gear, Worm gear, Belt pulley - DIY science and small production, product design, mechanical Technology model - Material: Plastic - 100% brand new and durable Size Chart: Packing: 15x10x3cm / 5.91x3.94x1.18inch Package Included: 81 Pieces DIY Model Toys Wheel Gears.Including pindle gear, Crown gear, Fan shape Gear, Worm gear, Belt pulley. 81 Pieces DIY Model Toys Wheel Gears. - 81Pieces of gear can match each other, all combined into gears, these gears are suitable for shaft.