AD 56409940 42" 16 Single Row Soft Nylon Cylindrical Scrub Brush for Nilfisk Advance 2042, BR 1100C-XL Scrubbers. Durable and long lasting .014" diameter Nylon filament is great for light duty scrubbing jobs on sealed and sensitive flooring . The softer Nylon bristle is great for scrubbing freshly epoxy painted concrete as well as tile, stone, and terrazzo flooring. Designed for softer finishes. Soft Nylon brushes will not scratch or marr the surface. Great for highly polished flooring. Equivalent to Nylon, Nylex. Fits Nilfisk Advance 2042 Hydro Retriever and BR 1100C-XL riding floor scrubbers. Actual length 40.875". Two cylindrical brushes required. Priced each. Replaces Nilfisk Advance 56409940, 409940.