... material quality such as:ROHS/CTI/SGS.it have a good resistance from rust,generally,finish goods can be anti-rust ... anti-theft.so the stainless steel product don't need to be do any plating,its nature color can ... , motorcycles,agricultural machinery,construction,transportation,electric power,electronics,chenicals,home appliances,military inductry and other industries.. standard DIN7504size any size ...