ABC 17-45 Series 2 Blade Cleaver Propeller

ABC Cleaver Series 2 Blade Propellers, .45 Bar
1.6 Inch (40.6mm) to 1.8 Inch (48.2mm) diameter props.

Shaft Size 3/16" (4.75mm) from 1516 to 2016. 
Shaft Size 1/4" (6.35mm)from 2114 and larger prop diameters.

Available in three different pitches
1.5, 1.7 or 1.9 Pitch Ratio
 As pitch increases the blade angle increases.

How the ABC numbering system works.
XXXX-XX-XX(X) XXX

Example an 1815-17-45(2) CLL breaks down like this.
1.8 is the diameter in inches.
1.5 Pitch Radio
17-RAKE ANGLE
45-BLADE AREA RATIO
(2)-NUMBER OF BLADES
CL-CLEAVER OR CP-CHOPPER
L-LEFT ROTATION OR R-RIGHT ROTATION

These also come in the opposite rotation for twin motor applications. See Product ID: abc-XXXX-17-45(2)CLR