12 kV to 420 kV, 51020 kA Single Three Phase Distribution Type and Station Type, Porcelain Bushing Surge Lightning Arresters with Mounting Pad, Terminal Connectors, Insulating Bases & Surge Monitor.0.5 kV to 72.5 kV, 510 kA Single Three Phase Distribution Type and Station Type, Polymer Bushing, Surge Lightning Arresters.