The brushes are shorter in brush length than my original, but are ok for the use.

Nice Brush

My Shark Rocket vacuum is great for carpets, but the dusting brush is crazy, very stiff and the dusting cup interferes with trying to clean window tracks or other close-in objects. The Shark soft dusting brush works for ceiling fans and furnace vents, but is flexible and collapses into another position if used for other purposes. I bought an adapter, also an extension wand and can now clean my window and slider tracks easily with this softer, smaller, more flexible flat brush. The bristles appear to be horsehair, which I usually find too scratchy for furniture, but these bristles are softer than most horsehair. Haven't used it long enough to see if the bristles collapse into the center of the tool, but because they are short (about 1") this probably won't be a problem. No issues with bristles falling out.