I have a TRO4, 22p prop for sale. Brand new, used one afternoon for testing. To much prop for my setup. This is a 4 blade prop and has an aggressive pitch to it. It runs more like a 24p prop. Asking $280. These props are the same as Mercury. They take a hub kit for which ever your engine is. Made by Power Tech. Power Tech does have a website and buy direct. e-mail me at noblechas@aol.com thanks