Unger 2.75 in. W Hard Bristle 29.5 in. Rubber Handle Dryer Vent Brush - Ace Hardware
Amazon.com: Deflecto DVBRUSH12K/6 Dryer Duct Cleaning Kit, Lint Remover, Extends Up to 12 Feet, Synthetic Brush Head, Use with or Without a Power Drill, accessory, Computer : Appliances
12 Feet Flexible Dryer Vent Brush Cleaning Kit,6 Rods and 1 Brush Head - Walmart.com