These Gemfan 31mm 4-Blade propellers will take your micro drone to the next level! Its aggressive blades provide great thrust and fast acceleration. Features - Patented design and unique shape - Propellers are optimized for racing - High durability and extremely lightweight - Excellent quality Specifications - Length: 1.2 inch - Pitch: 2.0 inch - Number of Blades: 4 - Material: Polycarbonate - Weight: 0.31g - Hub ID: 1mm - Paddle disk diameter: 31mm - Center thickness: 5mm - Maximum blade width: 5.71mm - Recommended motor: 0703-1103 Includes - 4 x CW Propellers - 4 x CCW Propellers