This is the Reedy Vector X20 6.5T Brushless Competition Motor from Associated.

FEATURES: Dual axis balanced 12.5mm sintered Works Team rotor
          Waterproof PreciSensor system offers precise sensor positioning for
            greatest power, throttle feel and efficiency
          Five timing inserts with degree markings for fimer adjustments
          Optimized packed stack for improved drive feel and efficiency
          Oversized ABEC 5 bearings for maximum durability
          O-ring dampening for vibration-free operation even under high RPMs
          Precision-machined 7075-T6 aluminum housing with optimized cut-outs
            for lower running temperatures
          LRP guarantees this motor to be free from defects in material or
            workmanship for 30 days from the original date of purchase (non-
            European countries only). This limited warranty does not cover
            defects resulting from misuse, improper maintenance, outside
            interference or mechanical damage.

INCLUDES: Reedy Vector X20 6.5T Brushless Competition Motor with Instruction
            Sheet

REQUIRES: Compatible electronic speed control (do not use aggressive advanced
            timing speed control profiles with this motor)

SPECS:    Voltage Input: 3.7 - 7.4V
          RPM: 38480
          Specific RPM/Volt: 5200
          Power: 414
          Weight: 5.8oz (165g)
          Winding: Star (multi strand copper winding)
          Sensor Assignment: Compliant to IFMAR/EFRA/ROAR/FEMCA/JMRCA/BRCA/
            DMC rules

                                                                   jxs 05/14/12