??GoolRC Green ABS 5040 5*4'' CW/CCW Propeller Prop for Mini H250 H280 H300 Quadcopter Multicopter.
ABS material£¬ when install them on their H250 H280 H300£¬ the noise of the quadcopter can be very low and not that harsh.

Features:
Distortion resistant
Low noise and high quality
Extremely lightweight and durable
These Propellers have set the gold standard for the Multirotors
Made of reinforced plastic£¬ making them strong and very well formed
Known for their durability£¬ great balancing and superb hub centering and expendable price
This propeller pair is supplied with contentric centering rings to ensure accurate centering

Specifications:
Material: ABS
Color: Green
Length: 12.7cm/5.0"
Hub ID dia: 5mm
Hub OD dia: 10mm
Hub Dimensions: 6mm thick£¬ 11.5mm diameter
Suitable models£ºQAV250/280/300 EMAX 250/280/300/H250/280/300MM
Rotation: clockwise and counterclockwise

Package Information:
Package size: 13 * 10 * 1.5cm/ 5.1 * 4 * 0.6
Package weight: 29g / 1oz
Adhesive taps package

Package List:
5 * CW Propeller
5 * CCW Propeller
10 * Hub Adapters