SSS 2960 motor. 29mm Diameter by 60mm 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 end bells that are assembled with screws for both strength and ease of maintenance. Vented endbell and front mounting plate for additional air cooling.Specs: Magnets: neodymium Motor Shaft: 1/8" (3.175mm) Can Measures: 29.5 diameter x 60mm long Weight: 150 grams Mounting screw diameter required: 3mmMounting Holes 19mm apart for use with most 28mm motor style mounts. Includes 3.5mm male bullet plugs soldered to the motor.OSE Suggests 20,000-35,000 total rpm for boats. We suggest most Fast Electric Boaters should run in the 25,000RPM range for sports boating or 30,000RPM Range for racing. These are only guidelines, we suggest if you do not have the experience to pick the correct motor, please consult OSE first or other members of the RC Fast electric boating community, either at a local club or on our OSE Forums.