BWR series, also available as compact integral helical/worm option, has been designed with a view to modularity: low number of basic models can be applied to a wide range of power ratings guaranteeing top performance and reduction ratios 5,7.5,10,15,20,25,30,40,50,60,80,100.BWR – Sizes: 025-030-040-050-063-075-090-110-130-150. Available versions. All types of IEC motors can be fitted to these units.