3-1/8 UMA VSI 0-4000 FT.

The vertical speed indicator is a precision instrument which provides an accurate indication of rate of change of altitude. This instrument is temperature compensated and is provided with a zero adjustment screw on the face of the case in the seven oclock position. Power: Static system.

3-1/8" Vertical Speed Indicator (Refer to Image #1)
Case: Valox 420 Plastic
Weight: 8.8 oz.