Type: E27 Porcelain Lamp Holder & Accessories Rated Current (A): 4.0 Rated Voltage (V): 500V (250V*) Rated Pulse Voltage: 5 KV (2,5 KV*) Rated Temperature: T270 (T180*) Overvoltage Category: III (II*) Approval: ENEC Brand: Arditi Country of Origin: Italy Materials: Porcelain Terminals: Screw Type for Rigid or Flexible Cables 0.5 ÷ 2.5 mm² Connection: Metal Bracket w/two M3 Threaded Holes (centre distance 13 mm.) and M4 Threaded Central Hole Screwed Shell: Zinc-Plated Steel