We're selling a set of 3-blade propellers. Quantity two (2): 17 (diameter) x 14 (pitch) counter-rotating. They came on our PDQ 34 power catamaran and are in good condition, but we replaced with them with 4-blades. Selling for $300 and will ship for an actual and agreed-upon amount. Mark Doyle www.OnTheWaterChartGuides.org