2 blade brass propeller. 3/16 shear pin size. 9/16 prop shaft size. Diameter is 5 7/8". Has rear pin mount. Considerable amount of cup. Nice shape.    Note:  All pitch sizes are measured at the center of the blade.  All sizes quoted are approximate and may vary slightly.  Sizes quoted, eg, 10 1/2-10 3/4 means the blades are not equal.  All propeller sales are final.  Ask questions first before buying.