Coreless 8.5 x 20 Coreless Motor Propeller set for Micro Quadcopter/ Drone

Description

These are 8.5×20 size Coreless Motor DIY Micro Quadcopter. Their smooth surface can greatly decrease the wind resistance during the flight. Therefore, 

Besides, the propellers are made of high-tenacity material and thus can sustain crashes. You can have these 4 propellers, or let’s say 4 pairs of Popellers for your mini-copter just to take off, or hold them as spare parts for replacement.