Features a 4074 2000KV motor with a 40-S water cooling jacket, specifically designed for 1000mm RC boats. CNC aluminum alloy shell with anodizing treatment is durable, wear-resistant, and aesthetically pleasing. High-performance circulating water cooling jacket with inlet and outlet connectors allows for extended motor operation without burnout. 4 poles with 12 slots provide high torque and efficiency. High-purity copper winding maximizes efficiency. Precision-balanced rotor with high smoothness and accuracy for optimal reliability and maximum RPM. O-ring seals for leak prevention. Precision engineered for maximum energy conversion. Specifications: Material: Aluminum Alloy Color: As shown in images Type: RC Accessory Weight: 438g Motor: KV(rpm/volt): 2000KV RPM: 60000 Watt: 2800W No-load Current: 3.1A Max. Voltage: 30V Diameter: 40mm / 1.57 inches Length: 74mm / 2.9 inches Shaft Diameter: 5mm / 0.2 inches Connector: 4mm gold banana connector Water Cooling Jacket: Item Name: 40-S Water Cooling Jacket Outlet Connector Diameter: 4.5mm / 0.18 inches Jacket Inner Diameter: 40mm / 1.57 inches Jacket Outer Diameter: 48mm / 1.9 inches Jacket Length: 57mm / 2.2 inches Package Includes: 1 x Motor 1 x Water Cooling Jacket