Industria rotterdam industrial cage light cast aluminium, clear glass e27 / e26. Depending on destination, all lights are rewired and bulb holders are replaced for new ce certified (220 volt) or ul listed (110 volt) parts. This piece has an attribution mark, i am sure that it is completely authentic and take full responsibility for any authenticity issues arising from misattribution, up to 250v (europe/uk standard).the wiring of this item may be original and might need replacement, if not specified otherwise.