This is the Castle Creations Short Course Race Pro 3800kV Brushless Motor. FEATURES: Extreme performance for 2WD short course and CORR vehicles running with 2S LiPo power (maximum vehicle weight should not exceed 6.5lbs (2.9kg) Also ideal for racing 4WD SCT/CORR vehicles on 2S in high temp environments Four pole design One year limited warranty beginning at date of purchase INCLUDES: Castle Creations 1410 Series 3800kV Brushless Motor with Connectors REQUIRES: Installing in vehicle and connecting to ESC such as the Castle Creations Mamba Max Pro (CSEC9600) SPECS: Shaft Diameter: 0.20" (5mm) Can Diameter: 1.4" (36mm) Can Length: 2.1" (53mm) Connectors: 4mm bullet COMMENTS: This motor can only be used with a 2S LiPo battery when using the stock gearing of the vehicle. A 3S LiPo can be used, but the gearing of the vehicle must be changed to handle the increased power output. jxs 10/27/11 ir/jxs