The present invention relates to a metal treatment composition including Tin Chloride and processed montmorillonite clay. Such artificial chromosomes are useful in a range of genetic therapies. The derailleur motor is mounted to the derailleur motor support. Each module includes one or more emission reducing devices to reduce undesirable constituents in the exhaust gas stream from the internal combustion engine. Thus, the present invention offers efficient method of obtaining map data in the communication-type navigation system.