1Application: The silencer cotton is applicable for car's, and motorcycles's exhaust pipe or down pipe, which has high performance and wide application. 2Durable Material: Made of durable fiberglass material, which could effectively absorb sound and provide optimum noise reduction performance. 3Parameter: The package includes 2 pieces of fiberglass cotton, with a dimension of 35x25cm, which is enough to pack a exhaust pipe for your motorbike. 4High Performance: The exhaust pipe sound absorbing cotton is heat resistance, high temperature proof, has good heat insulation, not easily damaged. 5Wide Application: It is suitable for thermal insulation of cold and hot pipes, boilers, entertainment places, interlayer thermal insulation, silencing system and fire proof board.