I am looking to for a straight across trade. My 16 pitch stainless steel mercury/quicksilver "Vegence" stainless steel prop for a 19 pitch ss prop of similar quality/condition. My prop has no nicks or dings and has less than 75 hours on it total. If your boat struggles to get out of the hole and/or runs at too low RPM at wide open throttle (~5200 to ~5600 RPM depending on motor) you may need a lower pitch prop for better performance. A lower pitch prop is also better for slow trolling, as long as you don't exceed the top end RPM at WOT. This prop came with my newish engine and the guy I got it from had a larger, heavier boat and did more trolling than I do. Photo shows prop, well sort of. Prop is currently removed from engine.