Robust steel housing and steel frame fits to housing with screws. Powder coated white RAL9016. Double prismatic (DP) or Opalic (OP) plastic sheet in steel frame (IP44). Suspension brackets (MNT-S) are included for TL11-R222. For TL11-R250 Suspension brackets (MNT-S) have to be ordered separately. For battery versions (EB3), Emergency box EB3 has to be ordered separately.