Mercury - Bravo Three XR Pro Finished Racing Propeller - 4-Blade Front - 250 to 520 HP Outboards - 15.8 Dia. - 25.5 Pitch - 48-8M0125745 Designed for 250-520 HP gas and diesel-powered sport cruisers and performance Bravo Three applications. The 4-blade forward (front only) propeller features a built-in cup for incredible handling and improved fuel economy at cruise and boat control. Intended for the Bravo Three XR drive and can be used with the Bravo Three and Bravo Three X drives. The Pro Finish provides performance leading edge, consistent cup heights, zero balance for minimal vibration, and a durable high luster finish. For Rear prop, see 48-8M0125744 As a general rule, the odd pitch numbered Bravo Three XR propellers run similar engine RPM to the next higher pitch even numbered Bravo Three propellers. For example, the Bravo Three XR 27 pitch matches the RPM of a Bravo Three 28 pitch with a satin finish.