13.75" DIAMETER, AVAILABLE IN 18"-28" PITCH, 4 BLADES, RIGHT-HAND ROTATION, HIGH RAKE, SHARP RADIUS CUP, EXCELLENT LIFT, SMALL HUB, MAY BE RUN OVER- AND THRU-HUB EXHAUST, OR SEALED WITH RING, PREFERS HIGHER MOTOR ELEVATIONS, MOST SIMILAR TO MERCURY TROPHY - POLISHED FINISH ONLY. SQUARE HUB.