Poolmaster 27250 Commercial Heavy-Duty Gunite Flex Vacuum. Poolmaster’s Commercial Collection offers professional-grade products constructed for the most demanding service use. All commercial products are made of high grade, durable, mar-proof materials that meet professional demands and standards. Poolmaster’s Commercial Heavy-Duty Gunite Flexible Vacuum was built for maintenance professionals and serious home maintenance consumers. The extra-wide flexible body allows for easy contouring on the pool or spa floor, and deluxe mar-proof Nylon wheels with ball-bearing mechanism rolls smoothly and prevents scratches and scuffs. Six weights allows for vacuum to stay properly submerged. Chrome-plated swivel handles allows for superior maneuverability. DO NOT use on vinyl liner pools. Can be used with any standard pool pole or vacuum hose – sold separately.