Vintage Perko ventilator. This item has been replaced by 0870DPOCHR. The newest version has a plastic base with a chrome plated cover. This item has a metal base and cover. 5 1/8″ long, 4″ wide and 3″ diameter hose connection. New old stock item not in original packaging. There are very minor blemishes to the chrome from years of storage. There is no mounting hardware included. 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. 10-9990