Gemfan original 
High Quality full carbon fiber 1555 propeller, very well balanced, very robust and very reliable.
 
 
Specifications:
 
Material: carbon fiber
Epoxy resin cover
Size:15*5.5
High gloss 3K twill finish
Length: 15inch
Pitch: 5.5inch
Each weight: 14 g
 

Your purchase includes:
1x 1555 CF clockwise propeller
1x 1555 CF counterclockwise propeller
2x3mm hole on the sides1x4mm hole in the center1555 Carbon fiber propeller CW&CEach propeller has three mounting holes:CW is the best choice for slow motors.