About the Aqua Pro Hybrid Brush
The dual trim design of the Aqua Pro Hybrid Brush incorporates bristles made from both nylon and boar's hair. The combination of these materials delivers a highly dependable water-fed brush you won't want to live without. The inner boar's hair bristles are shorter in length and work at efficiently agitating dirt and grime. The outer nylon bristles are longer and fan out, ensuring a smoother glide while also accessing window corners and edges with ease. 
With two sizes available, you can choose from a 13-inch, 20 brush.  The 13-inch and 20-inch brushes come equipped with two powerful pencil jets to provide a direct and steady stream of water onto the surface.