Brush, 18-in, 3 Lug, Purple Grit Bristle, Heavy Scrubbing, Concrete / Stripping (7693531).
Fits: NSS Champ 2929/3529
Genuine TASKI part number 7693531. Not sure it fits your machine? Send us your model and serial number at help@sweepscrub.com or call 877-449-0447 and we will confirm before you order.