If your exhaust is getting worn and you need to repack you exhaust, we offer quality fiberglass packing/wadding material for your motorcycle exhaust muffler. High temperature resistant, sound absorbing, giving a more solid tone to your exhaust and reducing droning noise on highways. One pack of this material will fit one 10" exhaust muffler. The fiberglass packing should comfortably fit into mufflers with 110mm ext. diameter or lesser.