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Degree and Slope Abney Level OS-S
Abney level with clinometer
Tube is 5 1/8 in long.
Radius arc of 1 1/8 in.graduated in degree(0-90) in both directions.
Vernier reading of 10 minutes.
Slope scale 1:1 and 1:10
Padded belt-loop case included.
Degree And Slope Abney Level OS-S