Feature: 1. 4 Poles High Torque Rotor Motor: The 2150KV brushless motor has stable output power, with enhanced throttle response, excellent acceleration, strong brake and throttle linearity. 2. CNC Machining: Adopted CNC machined 6061 T6 aluminum front and rear cover, the brushless motor has high purity and high temperature resistant copper windings, which can provide its efficiency. 3. High Toughness: The high toughness stainless steel output shaft ans bearings with high accuracy brings the aluminum alloy RC brushless motor kit durable, waterproof and dustproof, powerful resistance current ability, good heat dissipation. 4. Efficient ESC: The electronic speed controller has built in 5.8V 3A BEC, with heat sink and fan can control its temperature, keeping your motor running efficiently and cool. 5. Multiple Protection: The RC brushless motor kit possesses low voltage cut off protection, overheat protection, throttle signal loss protection, with programming card, which can easily changed internal timing, make motor suitable for different motors. Specification: Item Type: RC Brushless Motor Set Weight: Approx. 507g/17.88oz Motor: Shell Material: Aluminum Alloy Color: Red Diameter: Approx. 36mm/1.42in Height: Approx. 70mm/2.76in Shaft Length: Approx. 17mm/0.67in Shaft Diameter: Approx. 5mm/0.20in KV: 2150KV Rotation Speed: 50000 Maximum Power: 1600W Maximum Current: 70A Maximum Voltage: <23V Connector: 4mm Golden Banana Connector Electronic Speed Controller: Continuous Current: 120A Peak Current: 600A (10 Seconds) BCE Output: 5.8V, 3A Power Plug: T Shaped Plug Applicable Power Supply(Not Included): 2-4S LiPo, 4-8S NiMh Heat Sink: Material: Plastic, Aluminum Alloy Color: Red Single Fan Size: Approx. 30x30x10mm/1.18x1.18x0.39in Operating Voltage: 5-6V Application: for Traxxas, for HSP, HPI 1/8 Remote Control Crawler. Package List: 1 x Brushless Motor 1 x Electronic Speed Controller1 x Use Manual 1 x Heat Sink 1 x Programming Card