When asking such questions you need to provide information on the year and type/brand of trailer you have. Nitro used several vendors over the years for parts. That said, to get the "Actual" part you need it's always better to go thru the dealer. Their database uses the hull ID number. So, as long as the trailer is the same as when the boat was bought new they can give you the exact part you need. BUT, be prepared to pay handsomely for it. Sometimes its better to get the part number and search for the part online and/or thru the part manufacturer to get a better price!!