Description Model: Defender 16 1809-3Propeller Diameter: 1.8inch Pitch: 0.9inchesBlade: 3-BladeMaterial: PCWeight: 0.3gHub Diameter: 4mm Hub Thickness: 5mm Packing List 6 x Defender 16 1809 Prop CW6 x Defender 16 1809 Prop CCW