The PowerTech OFS4 has full tip cup and moderate rake angle. This prop has excellent stern lift and grip. It is comparable to and interchangeable with the Mercury Mirage and Yamaha Saltwater Series blade design. 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.