Mear Water Flow Calculator for Pipes, Ducts, Sewers, and Open Channels

Country of manufacture: England,            Date of manufacture: ____
Diameter: 19.5 cm,      Weight: 172.2 gms
Materials: all plastic
Scales: numerous, specialty
Front
     Outer Disk: Flow, Flow, Length of Pipe, Velocity, Flow
     Inner Disk: Bore of Pipe, Pressure Drop, d/D
     Cursor: Flow (part. full), Flow (running full), Pipe Material, Instructions
Back
     Outer Disk: Flow, Flow, Wetted Perimeter, Velocity, Flow
     Inner Disk: Area of Channel, Slope, Instructions
     Cursor: Channel Material Indicator, Instructions
Condition: C0 (Mint w/all accessories)
Came with: Blue plastic slipcase w/snap closure, manual