This is the Castle Creations 1515 Sensored 4-Pole Brushless Motor (2200kV).

Drivers in all applications demand clean starts when coming off the line. Crawler fans require high-precision low speed control and torque for climbing, racers need precision and predictability, and dragsters don't have a millisecond to spare. To achieve all of these performance demands and more, we have integrated rotor position sensor technology with our improved high power and high efficiency motor design. Through the use of our sensors, the position of the rotor is always known by the ESC. This eliminates the possibility of encountering cogging or inconsistency during startup. Users will experience PRECISE throttle control and BUTTERY SMOOTH starts plus the RAW POWER and LONGER RUN TIMES that our highly efficient motors products.

Features:
Our IMPROVED 4-POLE 12-SLOT design boasts exceptional EFFICIENCY and produces LESS HEAT.
QUIETSENSE(TM) technology shields the sensors from magnetic field noise generated from the motor coils and keeps your motor and ESC in sync at all times. Use of a Flux Shield(TM) in conjunction with secondary Sense Magnets delivers even HIGHER PRECISION and MORE EFFICIENT startups.
Our OPTIMIZED design eliminates the need for mechanical timing adjustments. Our sensor alignment method delivers uniform timing and torque in both directions, automatically.
REBUILDABLE design allows users to replace front end bell/bearing assembly or rotor/shaft assembly.
ROAR standard sensor port and labeled connections.
Updated modern and sleek design; looks as cool as it performs.

Specifications:
Input Voltage Range: 2S-6S LiPo (4s max when paired with Mamba X ESC)
Kv: 2200
Max. RPM: 60,000
Size: Length: 75.4mm, Diameter: 40mm (41.4mm with fins)
Weight (w/wires):
Shaft Size: Length: 20mm, Diameter: 5mm
Mounting Hole Specifications: M3 and M4 @ 25mm
Connectors: 4mm male Castle Bullet Connectors, includes 210mm length sensor wire.
Items Needed for Operation: Compatible Electronic Speed Control (ESC)
Application Guidelines: Ideal for 1:8 scale Off-Road buggies weighing up to 9 lbs.
Recommended ESC(s): Mamba X

Includes:
(1) 1515 Sensored 4-Pole Brushless Motor (2200kV)
(1) Sensor Cable (210mm)
Mounting Hardware