Gemfan Hurricane 5236-3 for Racing Material:PC Weight:3.9g Pitch:3.6in Prop Dia:134.1mm Center Thickness:6mm Center Hole Dia:5mm Colors: Clear Gray, Orange, Milk White, Purple Features: Racing Propeller; Faster, more aggressive and powerful than normal 5/5.1 inch. Package Includes: 2CW + 2CCW props