HQProp’s 5.1×4.1×3 propeller features POPO compatibility. This doesn’t mean you can’t use this prop with normal motors, they still work perfectly with normal motors and prop nuts.

Specifications

• Size: 5.1″
• Pitch: 4.1″
• Material: PC
• Blades: 3
• Weight: 4.5g
• Mounting hole: 5mm
• Center Hub Thickness: 7mm
• POPO Compatible: Yes
• Color: Grey

Includes

• 2x CW 5.1×4.1×3 Propellers
• 2x CCW 5.1×4.1×3 Propellers