Used but very nice Mercury 3 blade stainless steel prop. This is a larger diameter V6 case size, believe it originally was on a Mercruiser Alpha drive. Diameter and pitch are unknown as there are no markings or stampings on the prop. This was one of many props I bought from an individual who has since passed away and raced a Bridgeport powered tunnel hull, so I would assume this prop along with others I purchased from him had been customized with different cups, etc.