Feature:1. 4 Blades Design: These propellers are designed with 4 blades, with high wind and thrust, and good performance.2. With 2mm Hole: The outer diameter is 100mm with a 2mm inner hole, suitable for a motor shaft with a diameter of 2mm.3. Durable Material: Made of ABS plastic, resistant to impact and abrasion, not easy to deform after long term use.4. 10Pcs in 1 Set: The kit contains 10pcs 4 blades propellers, which are small in size, easy to install and do not take up space.5. For DIY Toys: Commonly used in DIY toys, such as remote control boats, power car models, etc.Specification:Item Type: 4 Blades PropellerModel: XR-150Material: ABSPurpose: Suitable for DIY toy accessories remote control car modelOuter Diameter: Approx. 100mm / 3.9inInner Hole: Approx. 2mm / 0.08inBlade Quantity: 4 blades.Package List:10 x Propeller