The PowerTech OFS4 has full tip cup and moderate rake angle. This prop has excellent stern lift and grip. It is comparable to the Mercury Mirage and Yamaha Saltwater Series blade design, but with four blade hole shot and holding ability. It is excellent for V bottom offshore style boats in single, twin and triple engine applications. 15-1/4″ diameter, Cushion Lok hub, for V6 (4-3/4″) gearcases.