Trough Roller with 20/ 30 Degree Troughing Angle is made of grade gauge steel tubing or seamless steel tubing to ensure optimum performance for longer period of time. The Trough Roller is available with special impact rings, which are made of shock absorbing compound. The Trough Roller is normally made with troughing angles of 20 and 30 degrees. Trough Roller with 20/ 30 Degree Troughing Angle is designed to provide smooth transportation of bulk material.