material :   Glass Fiber Nylon

Pitch:    7in

colour:   black

prop disk diameter:   381mm

Center Thickness:   12.2mm

Center Hole Inner diameter:   6mm+adapter

Max Prop Width:   34.3mm

Recommended Motor:   4218 or 4218+

Gemfan 1507-3 is matched for big wheelbase drone with four rotors, which has strong stiffness and good balance.