DragonFly 6045 6x4.5 Bulletproof Props Composite Propellers Red Corlor 4Pairs Dragonfly 6045 Bulletproof Propellers?are?composite props with a slight change in mixture.? They offer extra strength when compared to other propellers. Type: 6045 6" X 4.5" Quantity: 4 pairs (4 pcs CW rotation, 4 pcs CCW rotation)