... good .Natural, Nickle Plated, Tin Plated or any coating .Screw,high quality steel (Iron) ,surface : yellow zinc,nickle,white zinc Voltage:250 ... or specificationsWe are specialized in brass terminals,brass connector, terminal block ,link bar etc. for 6 years. Tolerance:±0.3mmOnly part ... of the products are listed above, please visit our web,contact ...