AD 56507340 50" 8 Double Row Proex/Wire Herringbone Pattern Main Broom for Nilfisk Advance Exterra / SR 1900 / SW8000 Sweepers and Sweeper/Scrubbers. A mix of different diameter x-shaped polypropylene combined with crinkle wire. 50" (127.6cm) Length. A chevron pattern for more effective higher speed litter pickup. Similar to a patrol broom. Fits Nilfisk Advance Exterra, SW8000, and SR1900 Sweepers. Replaces Nilfisk Advance 56507340, 507340. Our Part Number AD 56507340