Mercury - Maximus Long Tube Lab Finished Racing Propeller - 5-Blade - 300 to 450 HP Outboards - Up to 600 HP Sterndrive - 15 Dia. - 28 Pitch - 48-889966L63 The Lab Finished Maximus propeller is designed to reduce propeller slip with high-performance, high gearcase drive height sterndrive applications. Excellent top speeds, great handling, good mid-range speeds and eye-popping planing performance for Deep Vee, Deep Step Vee and Deck boats. The Maximus Long Tube propeller fits 300 to 450 HP Mercury outboard models, up to 600 HP sterndrives.