This is the Helicopter Pitch Gauge from HeliMax.

FEATURES: Allows easy setting of pitch for main blades and flybar paddles
          Works with a variety of main rotor blade sizes from 425mm to 710mm
            chord blades commonly found on 250 to .90 size helicopters
          Measures pitch from -15 to +15°

INCLUDES: Helicopter Pitch Gauge

                                                                   jxs 04/29/10
                                                                updt lmm 6.4.10
                                                                         ir/jxs