FFO-01 version 1 - stool on five-arm base without backrest • large round padded seat (ø 380 mm) • Adjustable height range: 590-790 mm (optional extension 530-690 mm) operated by gas spring • maximum permissible load -180 kg FFO-01 version 2- stool on round shaped base ( three-arm base) with 5 castors without backrest • large round padded seat (ø 380 mm) • Adjustable height range: 550-750 mm (optional extension 490-650 mm) operated by gas spring • maximum permissible load -180 kg