Xoar PJP-T-L 15x5.5 1555 RC Quadcopter Propellers CW CCW. 1 Pair of 15 Inch Carbon Fiber Props for Low Kv Brushless Motors (T-Motor, Hacker, KDE, Scorpion Power) PREMIUM MATERIAL: Made of Premium Quality Carbon Fiber Fabric. It is light weight, strong, good endurance and rigidity. Perfect for Quadcopter Multicopter Applications. PRE-BALANCED* : Each XOAR Precision Pair is Manually Balanced Both Horizontally and Vertically for Minimal Vibration and Hand Selected for Minimizing Weight Difference in Each precision Pair for the Best Performance. PERFORMANCE : Stable and Accurate Performance for Multi-Rotor Applications with Low Kv Brushless Motors. Responsive, Smoother and Quieter Flight Compare to Aftermarket Plastic and Carbon Fiber Props. APPLICATIONS: Professional Grade Applications Where Performance and Accurate Response are TOP Priority such as Cinematography, Security, Agriculture, Survey & Mapping, Research & Rescue, Mining, Traffic Monitoring and More. SPEC: Diameter: 15 in | Pitch: 5.5 | Weight: 21 g  2 g Per Prop | Bore Diameter: 6mm | Side Holes Diameter: M3 | Circular Diameter: 12mm | Copper Adapter: 6 to 4 Convert Bore size from 6mm to 4mm | Props: 1 x CW; 1 x CCW