PleMade for the traditional full-length keel market, the Hydralign A was designed to increase performance where other props couldn't fit. While it comes with a larger diameter hub, it has a hub length of only 82mm, making it perfectly suited to older yachts. Launched in 1992, on the two time Hobart winner, Margaret Rintoul, the A Model has been one of our best sellers ever since. The prop can be counter bored for nut to suit a shorter taper if required. Can be set up for right hand or left hand rotation. Specifications Diameter Range: 16” to 20” Shaft Range: ¾" – 1¼" Sail Drive Option Available Propeller manual can be viewed here for more information or check the fit with our Hydralign A fitting template here (please note this is to be printed A4).