Lewatit ® Ultrapure 1294 MD is a “ready to use” mixed bed for final polishing in Ultrapure water applications. The high grade gel type components are intensively purified to achieve highest purity water conditions. Due a special conversion process of the SBA component, Lewatit ® Ultrapure 1294 MD has very high capacity for boron and silica. Avoiding excessive mechanical stress during mixing to an equivalent ratio leads to an extremely low particle release. The performance of each produced batch number of Lewatit ® Ultrapure 1294 MD is controlled. The gel type components have a narrow diameter distribution, thus the ready to use mixed bed can be easily separated for regeneration in mixed bed systems. By reason of the monodisperse production the resin mixture has a very high physical and chemical stability. High metric flow rates with low pressure loss are possible.