>NSF H1 approved, high performance synthetic food grade gear oil for food and pharmaceutical processing industries.
Also, could be used for lubrication of conveyor chains at ambient
temperature.

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6" Digital Depth Gauge. Range 6" (150mm)
Accuracy + 0.02 mm.
Base width: 4" (100 mm) 
Base Thickness: 9/32" (7.0 mm) 
Resolution: 0.01 mm
Metal construction with dual mode measurement in inches and mm
Large high contrast LCD digital readout
Free wheeling thumb roller mechanism for smooth movement along the linear scale 
Integrated data output interface to tansfer data to PC/Laptop (data cable not included)
Measurement can be zero set at any position along the scale for incremental measurement 
Convenient to use locking screw to set caliper at any desired position; a feature very useful in applications requiring repititive measurements.