1>Nickel plated metal connector 2>Material:steel 3>Metric tolerance:+/-0.01mm 4>Certificate: ... parts,eg.furniture,electronic and eletrical appliance,automobile, sport equipment,medical equipment.2>Material:aluminum,stainless steel, copper,alloys,mild steel ... certificate:ISO9001:2008,ISO14001:20048>Meet RoHS nickel plated metal connector