Tri-Blades 4040 Bullnose Propeller (8 Sets, 16CW, 16CCW) for Quadcopter 4040x3 Props for Drone Helicopter FPV RC Racing XSOUL LATEST DESIGN ITEM: Tri-blades 4040 bullnose propeller, 4 inch 3 blades 4040x3 props. ADVANCED DESIGN: Optimize appearance design, powerful, balanced and light. QUALITY MATERIALS: PC+ fiber glass injection, indestructible and durable. MOST OF DRONES CAN USE: With 5mm shaft diameter, works with most 250mm to 310mm mini quadcopters and helicopters. EXCELLENT VALUE: Pack of 8 sets propeller (16CW, 16CCW, 8 sets) and 4 pcs XSOUL logo sticker.