It is natural, that continuous development of free-standing cabinets brings development of accessories. Customers´ need for instalation of really heavy equipment into their cabinets, wchich stand on castors, leads to the introduction of new type of heavy duty castors. New castors have tires, which can eliminate floor unevenesses and they are easy to install and have big spread footing for cutting-down of point pressure on cabinet shell. This set of new heavy castors, with part number RAX-MS-X98-X1, contains 2 pieces of castors with brake, 2 pieces of castor without brake and necessary mounting material. Use of these castors compels a minor change to the cabinet construction. On cabinets produced up to 1st of July 2006 it would be possible to install only old type of heavy duty castors, cabinets produced after this date will be „universal“ and it would be possible to mount both types of castors. Distribution of older type heavy duty castors – part number RAX-MS-X53-X1 - will be finished after they will be out of stock.