The Knapp Polly-Cup incorporates a heavy cross-section with a wide sealing lip. These two unique features increase the wear life of Knapp Polly Cups and provide additional miles of service, thus reducing replacement costs.
In every way, Knapp Polly-Cups meet the toughest challenges at a price you can afford. Polly-Cups are available in two designs - the solid urethane Polly Cup and the steel-belted Polly-Cup. The steel belted design incorporates belted steel bristles cast into the wear surface of the cup so that the original point of contact with the pipe is on the metal tips.