AD 56505617 36" 6 Double Row Proex Herringbone Pattern Main Broom for Nilfisk Advance Sweepers and Sweeper/Scrubbers. Proex is a blend of three different diameter "x" shaped polypropylene filaments. Proex is a great all purpose broom for indoor and outdoor sweeping/scrubbing. Proex has softer filaments for fine dust and stiffer filaments for removing stubborn and heavier debris. Fits many models including CR1300, 2052, 5000, and 5015. 36" length main sweeping broom. Priced each. Replaces Nilfisk Advance 56505617, 505617, Carlsile/Flo-Pac 751436, 36751436. Our Part Number AD 56505617