Hobbywing made XERUN-4268SD-1900KV-G2 30401901 (HW-30401901) automobile Motors engine / ESC / Cooling Fan TypeScale : 1/8thBrushed/Brushless : BLSensored/Sensorless : SDPole Count : 4Relevant ParametersKV Rating : 1900LiPo Cells : 2-6SNo-load Current(A) : 4.5Size & WeightO.D.(mm) : 42(1.654in)Length (mm) : 68(2.677in)Shaft Diameter (mm) : 5.0(0.197in)fat (g) : 325g(11.464oz)Shaft Length(mm) : 5.0(0.197in)Other ParametersTiming : 20-40 Degrees(Adjustable)Applications :