Base module, Color black, Product range: SL signal towers, Connection technique: Push in terminals, Mounting type: for horizontal mounting, Fitted with: Base: Can hold tubes with a diameter of 25 mm (±0.5), Description: For wall thickness 2 - 3.4 mm, Number of modules: max. 5 modules, For use with: SL4-L-…, SL4-BL-…, SL4-FL-…, SL4-AP-..., Connection to SmartWire-DT: no