Square D (Schneider Electric) XVBZ03 Stack Light. Schneider Electric Harmony™ Fixing Base Series: XVB 400 mm H For Use With: XVBL 70 mm Dia Beacon and Indicator Banks and XVBC Tower Light Aluminum Black. Additional Description: SQD -XVBZ03 BLACK ALU. TUBE 400MM PLASTIC BASE. Catalog Description: Schneider ElectricBLACK ALU. TUBE 400MM PLASTIC BASE400mmHarmonyHarmony XVBUL Recognized - CE Markedblack aluminiumfixing basefixing base.