Electric Learning Kits Gears Kits Gear Robot Motor Toy DIY Parts for DIY Electric Toys for(75 Gear Packs)
- Number of tooth: 10-40tooth, Shape: flat without step.
- Material: 45 # steel, Tooth thickness: 20MM.
- Bore: different batchs, the bore will be a slight different,can be processed after purchase.
- Fast Shipping Guarantee: All parcel will be delivered in 7-15 days.