BGNing 15x5.5 3k Carbon Fiber Propeller CW CCW 1555 Cf Prop Con for T-motor Multicopter Quadcopter Hexacopter 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:15 Inch,Pitch 5.5,Main Hole Dia 4mm,Side Holes Dia 3mm,Center Distance 12mm