Highly mobile stool provides stability, comfort and ease of movements. Improves worker's posture and reduces back and leg strain. On 6 double lock-off casters featuring a reliable safety system: wheels unlock when one sits on the stool. 125 mm pneumatic lift. Base is ø 40,6 cm. Seat: 40.6 cm dia. Height, 36,2 to 48,2 cm. Cover: PVC-free black polyurethane. 5 year warranty against manufacturing defects. Lifetime guarantee for pneumatic cylinder.