With the SUN-FLEX®Active chair, you can intuitively stimulate your heart muscles, strengthen your back muscles and improve blood circulation. We recommend sitting with your legs balanced. This puts your body in a position similar to riding a bicycle or horseback riding. The active sitting function is ensured by the dome-shaped base. Due to the excellent selection of high-quality materials and the ease of use - simply pull the lever under the seat to adjust the height - the SUN-FLEX®Active will be your favorite part of your workplace for years to come. • Adjustable height 62-71 cm, gas spring • Anti-slip base, grooved natural rubber base • Chair covered with fabric (110,000 Martindale) • Frame made of steel covered with ABS plastic • Maximum load capacity: 120 kg • Seat: Ø 31 cm; black fabric (110,000 Martindale) • Leg, base: Ø 29 cm, white, metal and ABS plastic • Weight: 5.6 kg • Material: fabric, steel, ABS plastic • Color: frame white, seat black • Easy to assemble, instructions included • Warranty period: 2 years