Accessory code 645B Square wall-mount base to be used only in combination with the spacer base for conduit installation (art. XA05). 645B: Square wall-mount base to be used only in combination with the spacer base for conduit installation (art. XA05). Technical description: Wall base for square Walky optical assembly 180x180mm. Made of die-cast aluminium and treated with powder paint, which provides a high level of resistance to weather and UV rays. The base can be used together with the spacer base for installation via conduit. Colour: White (01) | Black (04) | Grey (15) | Rust Brown (F5) IK09