These flush mounted circular levels are designed to be set into a bore hole so that the flange seats on the reference surface. Some have mounting holes for screw fixing, and others are designed to be potted in with adhesive. They are set level with reference to the bottom surface of the precision machined flange. When this surface of the level is mated to a perfectly level surface the bubble will be central to the centring circle within 0.5mm tolerance. Some of the levels have plastic vials which are lower cost and virtually unbreakable and some utilise glass vials which give a better appearance, and higher accuracy. As well as the range shown below we can also manufacture these levels to suit a particular application or to match an existing specification. They can be purchased online in small quantities, or for larger volumes, or on-going OEM requirements please contact us for pricing. These levels are designed and manufactured in our UK factory to guarantee the highest standards.