Unger Professional HydroPower Bi-Level Scrub Brush Head, 10. Ungers 10-inch HydroPower Bi-Level Scrub Brush features stiff bristles that will tackle tough stains and dirt, providing aggressive scrubbing power with or without water. Its bi-level design offers multiple angles to take on messes. Attach it to Ungers Professional HydroPower Pole (sold separately) to make cleaning concrete, brick, and decks easy. Can be used with any Unger pole (sold separately). construction, or workmanship.Unger Professional HydroPower Bi-Level Scrub Brush Head, 10.Stiff bristles tackle tough stains and dirt, providing aggressive scrubbing power with or without water (Brush head only; pole not included)Bi-level design offers multiple angles to take on messesHard, bi-level bristles make cleaning tough surfaces like concrete and brick fast and easyAttaches to telescopic, fixed, or water-flow poles (not included) for professional cleaning power without a ladderDurable, synthetic head materials