This is the DF69 Impeller Unit from Multiplex.

FEATURES: Ideal for use in medium to fast model jets weighing approximately
            25-46oz (700-1300g)
          Suitable for motors with a maximum diameter of 1.1" (28mm), 0.63"
            (16mm), mounting hole circle and 0.16" (4mm) shaft diameter
          Removable intake ring allows the ducted fan to be installed inside
            model or mounted externally
          Rotor dynamically balanced at factory
          Plastic construction, black in color

INCLUDES: Case, Spinner, Rotor, Intake Ring, Aluminum Driver and Instructions

REQUIRES: Brushless motor such as the Himax A 2825-3600, MPUA3042 (do not use
            higher than 3S LiPo battery or nine NiCd cells with this motor)

SPECS:    Rotor: 2.7" (69mm)
          Length: 2.5" (65mm) including annular lip
                  2.3" (59mm) excluding annular lip
          Jacket Outer Diameter: 2.9" (73mm) approximately
          Outer Diameter: 3.7" (94mm) including intake lip
          Weight: 2.5oz (72g)
          Number of Rotor Blades/Stator Blades: 5/4
          Max. Rotational Speed: 46,000 RPM
            Typical Operating Data with Himax A 2825-3600 Recommended Motor;
          Battery: 3S LiPo
          Current Drain: 35.0 A approximately
          Input Power: 350 watts approximately
          Thrust: 820 g approximately

                                                                   jxs 08/07/12
                                                                         ir/jxs