Mercury - Maximus Short Tube Lab Finished Racing Propeller - 5-Blade - 300 to 450 HP Outboards - Up to 600 HP Sterndrive - 15.63 Dia. - 28 Pitch - 48-889966L69 The Lab Finished Maximus propeller is designed to reduce propeller slip for high-performance, high gearcase drive height sterndrive applications. Excellent top speeds, great handling, good mid-range speeds and eye popping planing performance for Vee, Step Vee, Cats and Deck boats. The Maximus Short Tube propeller fits 300 to 400 HP Mercury outboard models, up to 600 HP sterndrive.