The 6 or 8 Double Row Helical pattern (6DRH or 8DRH) is the most popular brush fill pattern for main sweeping brushes. In this fill pattern, the rows of bristles pick up fine debris while the empty spaces in between the rows trap bulkier litter. The DR pattern is a good choice for many customers because it gives good performance on both fine and bulky debris. This pattern is available in all fill materials.

Excellent wear life, but less aggressive and performs less well in conditions with moisture or high humidity. Often used on rough surfaces or high-temperature environments because of its toughness and long wear characteristics. Can generally be used in high heat conditions up to 150 Celsius.