"MUFFLER MATERIAL: FIBERGLASS; MUFFLER WILL NOT CORRODE OR DETERIORATE WHEN EXPOSED TO FRESH OR SALT WATER IN COMBINATION WITH EITHER DIESEL OR GASOLINE EXHAUST FUMES; ELECTROLYSIS IS ELIMINATED AND NOXIOUS ODORS ARE REDUCED; DIMENSIONS: 6 IN. I/O, 12.20 IN. DIAMETER, 31.43 IN. LENGTH, 5 IN. I/O LENGTH"