This is the Hobbywing QuicRun 4500kV 2435SL 1/18 2030 Brushless Motor.

Features:

• Its 2-pole rotor creates great torque: The QUICRUN-2435 brushless sensorless motor suits various 1/16 & 1/18 vehicles, especially buggies and monster trucks.
• Composed of high quality components: high tech aluminum alloy motor shell, heat-resistant wires and magnets, and long-life bearings.
• High quality pre-soldered gold plated connectors: The QUICRUN-2435 motor is a plug-and-play masterpiece.

Specifications:
kV: 4500
LiPo Cells: 2-3
Resistance: 0.0498
No-Load Current (Amps): 1.5
Max. Output Power (W): 150
Current at the Point of M.O.P *(Amp): 33
Outer Diameter & Length: 24mm & 36.5mm
Diameter of motor shaft & Length: 2.3mm & 14mm
Pole: 2
Weight: 73g
Applications: 1/18, 1/16 on/off-road/truck/monster truck

NOTE:

1. Two types of screws are suitable for the installation of QUICRUN-2435 motor: M2.6 (diameter=2.6) and M3 (diameter=3.0).
2. (This motor has 3 pairs of screw holes on the front end bell: 2 pairs are 2.6mm in diameter, and 1 pair is 3.0mm in diameter)
3. b) Depth of screw holes: QUICRUN-2435=4mm.