Abney Level
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17-640 5-1/4" Abney Level
5-1/4" long with radius arc graduated 0 to 90 degrees in both directions, with vernier reading to 10 minutes and percent of grade scale from 0% to 100%. Com-plete with Cordura™ belt loop case.

Topographic Abney Level
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All brass construction, 6-3/8" long, internal focusing telescope with a durable black finish, square sighting tube, and two interchangeable arcs: one arc graduated in percentage of grade and degrees, 0° to 60° in both directions, and the other graduated in percentage of grade and topographic scale. Complete with Cordura™ belt loop case.