Gates Fan V-Belt Length Finder, Tin

For an Unbroken Belt: The belt is looped around the two semi-circular "fingers." The lower finger slides down until the belt is taut, and the pointer on the vertical scale indicates the belt size.

For a Broken Belt: The instructions on the board explain how to use the specific physical markers and the ruler-like scale to determine the total length.

Measurement Scale: The vertical black bar features a numbered scale that corresponds to standard belt lengths (like A, B, or 3L series), allowing for quick cross-referencing without needing a flexible tape measure.