BGNing 9x5.5 3k Carbon Fiber Propeller Cw CCW 9055 Cf Prop Con for T-motor Multicopter Quadcopter Adopts The High Quality 100% 3K All Carbon Fiber Board Which Imported From Japan Improve Material. Each Pair of Propellers Has Perfect Dynamic Poise and Static Balancing Which Balance by Manpower. Especially Improves The Air-Powered Efficiency and Aerofoil Stability High Quality Ultra-Light Carbon Fiber Propellers Especially Designed for Multicopters Length:9 Inch,Pitch 5.5,Main Hole Dia 4mm,Side Holes Dia 3mm,Center Distance 12mm