1place of origin:Guangdong China(mainland) 2brand name:shiyo 3material:stainless steel,carbon steel, 4OEM is welcome flat slotted head screw1place of origin:guangdong China(mainland)2Model number:M4-M21 or according to client's3material:stainless steel,carbon steel or others4finish:Zinc plated, silver , Nickel plating 5use for loudspeaker box ,Electronic products ,and PC case flat slotted head ...