Ross Engineering Pipe Size Selector for Steam and Water

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Country of manufacture: USA,            Date of manufacture: ____
Overall length: 16.5 cm,          Width: 3.0 cm.,           Weight: 6.3 gms.
Materials: Plastic shell with plastic slide
Cursor: no cursor
Scales: specialized
Front: A₁, A₂ [ B₁, B₂ (ambient to 300° F Superheat), C₁, C₂ ] D (Pressure drop in either lbs per sq inch or Equiv Feet of Water
Back: Directions for Use (Steam) and Directions for Use (Water)
Condition: C4-C5 (Signs of Minimal to Normal use)
Came with: Brown leather pocket slipcase and one page instruction sheet

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