U.S. Pool Supply Professional Weighted Triangular Super Flexible Swimming Pool Vacuum Head with Side and Bottom Brushes. The three sides of a triangle-shaped head are flexible and will contour to the surface slopes in your pool. An easy-to-maneuver flexible pool vacuum head with durable nylon cleaning bristles that make it easy to quickly clean walls, corners, and slopes. It works excellent for use in above-ground & in-ground swimming pools and is safe for use in vinyl-lined pools. The weighted vacuum body keeps complete contact with the bottom of the pool's surface, making cleaning and removing debris much easier.