Product Description
These vials have a standard sensitivity of 35 arc minutes for 2mm of bubble movement.
The 'S' range are extremely high quality vials with a machined barrel form bore so they can be mounted or referenced against any of the four sides. They have circlip type inserts for line markings for optimum clarity and zero parallax error.
The 'SC' range have a moulded radius on one face only and have internally printed lines on the same face.
original image and text excerpted from:
http://measuretape.en.made-in-china.com/product/WMQJcoXGHkhH/China-Cylinder-Bubble-Level-Vial.html
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