This is the Ettore Super Brush. It is great for windows and dusting with flocked nylon bristles to make it super soft as well as hold dust or water. The block is angled for better bristle coverage on flat or uneven surfaces.

Use it by hand with the Pro+ comfort handle or lock it onto an Ettore REA-C-H extension pole for no-worry high reach cleaning. The handle swivels for easy cleaning at any angle!