Gemfan 2020 Propellers are great and efficient ducted 2" Props, with 1.9" Pitch, 1.5mm shaft and T-Mount, perfect for ducted micros!

Specifications：
Type: D51 (2020)
Material: PC
Adapter Rings: NO
Pitch: 1.9in
Prop Disk Diameter: 50.3mm
Center Thickness: 4.5mm
Center Hole Inner diameter: 1.5mm (1.5mm 3holes)
Max Prop Width: 10.6mm
Weight: 0.91g
Recommended Motor: 1103-1105kv

Includes：
4 CCW x Gemfan 2020 Ducted 4 Blade D51 Propeller
4 CW x Gemfan 2020 Ducted 4 Blade D51 Propeller