The alternative to the Rollomatic Concentricity Pro is mounted on an absolutely flat-milled holder and is simply placed on the mounting plate instead of the prism and fixed in place. Technical data: Robust construction with preloaded precision bearings. Easy to operate, fast measurement and suitable for transmitted light. The drive is manual via a toothed belt. The unit is burnished and black anodized and has hardened and precision-ground support rollers. This version is for workpieces with a diameter of 3 - 30 mm.