COO – breathing hole plug
TVL – three-part head section
KR – folding side armrests
STU – thick stitched padding
STSU – extra thick stitched padding
PVCS – PVC cover for leg section
NZP3 – paper roll holder
NZP3-Z – paper roll holder at the back
N90 – -90° head section adjustment
AC – antistatic castors (Ø 75 mm or Ø 125 mm)
VK2 – individually lockable castors (Ø 125 mm)
ME1 – increased lifting capacity (240 kg)
RS – handset
NS – foot switch
BB – battery backup
EVV – control safety switch