This is a 7 3/8D cut stainless steel outboard jet impeller from Outboard Jets. Part number 2124. This is a common impeller used in many bigger 4 cylinder large pump applications. If you are unsure which impeller is correct for your application please email, call, text or send us a message thru social media and we'd be happy to confirm the correct part number for you! 573-529-3849.