This accessory allows Talyvel® 6 or a bubble level to be mounted on the Taylor Hobson Micro Alignment Telescope to establish a truly horizontal line of sight.Using the stride base, Talyvel is mounted on the Telescope barrel for setting horizontal lines of sight. Talyvel is a pendulum type Electronic Level, which provides a digital reading in angular measure or gradient. Typical accuracy setting is 0.2 arc second; ie 1 μm per metre. For further details please refer to our Talyvel brochure.