This is the Reedy 5000KV Micro Brushless Motor from Associated.

FEATURES: Small design installs into most 1/18 scale vehicles
          Dual precision ball bearings
          High strength rotor
          3.5mm diameter male and female bullet connectors

INCLUDES: One 5000kV Micro Brushless Motor with bullet connectors, two 3x10mm
            machine screws

REQUIRES: Installation and compatible speed control

SPECS:    Cells: 2-3 LiPo, 6-8 NiMH
          Diameter: 0.88" (22.5mm)
          Length: 1.3" (33.6mm)
          Shaft Diameter: 2.0mm
          Weight: 2.0oz (57g)

                                                                    lmm 6.16.10
                                                                         ir/jxs