This is the 3800kV Neu-Castle Sensorless Brushless Motor from Castle Creations. FEATURES: For 1/10 scale vehicles including 2 wheel and 4 wheel drive short course trucks and AWD buggies and truggies Handles up to 2S LiPo battery packs Four pole rotor offers 20% more torque compared to Castle two pole motors of similar kV High power neodymium magnets 13 AWG wires with 4mm male bullet connectors installed and 4mm female bullet connectors included INCLUDES: 3800kV Neu-Castle Sensorless Brushless Motor with Power Wires and three each 4mm Male and Female Bullet Connectors REQUIRES: Pinion gear depending on application Connecting to ESC and battery SPECS: kV Rating: 3800 Length: 2" (52.7mm) Diameter: 1.4" (36mm) Weight: 8oz (227g) Shaft Diameter: 1/8" (3.2mm) jxs 09/21/11 ir/jxs