SSS 3656 6-Pole motor Built for P Limited 4s class racing (check club for racing rules). We have included 6mm bullet connectors to make this a plug-and-play unit when combined with a Raider 150 ESC.Kv Options for use with 4s Lipo, 1-2 pound hulls in the 27-34" range.2030Kv for Monos, Hydros, or Riggers.2500Kv for Riggers or Hydros in the 1-2 pound range.Special while supplies last! FREE Water Jacket with Motor Purchase! 36mm Diameter by 56mm Long Brushless Motor by TFL Racing. Hand-wound for high efficiency of up to 90%. Comes with high-quality bearings and neodymium magnets for high power. Includes endbells that are assembled with screws for both strength and ease of maintenance. Vented endbell and front mounting plate for additional air cooling. Specs: Magnets: neodymiumPoles: 6 Wire: 10 gauge Motor Shaft: 5mm with flat spot Can Measures: 36mm diameter x 55.6mm long Weight: 250 GramsMounting screw diameter required: 3mm MountingHoles 25mm apart for use with most 540 mounts.Connectors: 6mm bullets. Includes: (1) Motor and jacketOSE suggests 20,000-35,000 total rpm for boats. We suggest most Fast Electric Boaters should run in the 25,000 RPM range for Sport Boating or the 30,000 RPM range for racing. These are only guidelines; if you do not have the knowledge to choose the correct motor, please consult us or other members of the RC fast electric boating community first. Either at a local club or on our OSE Forums.