Genuine Mercruiser Mercury Quicksilver driveshaft 45-812773T. Approximately 18 1/2″ long, 12 spline and 13 spline. New old stock item in original packaging. Skippers Marine specializes in new old stock, recycled and those hard to find marine parts and accessories. Please check out my other Ebay store items. Don’t see what you are looking for? Feel free to send an email request. 9-0031