~Trimetal composite Silver Electrical Contacts can replace solid silver contact rivets, the same performance,but 30% to 65% silver conact material cost be saved,helped customers to save the product cost,and iTrimetal composite Silver Electrical Contacts can replace solid silver contact rivets, the same performance,but 30% to 65% silver conact material cost be saved,helped customers to save the product cost,and it's good for saving the limits of national resources-silver material.t's good for saving the limits of national resources-silver material.