For bar stools, office chairs and lounge chairs! This gas pressure spring is a pneumatic spring in the highest quality class III . A highly pressurized gas produces the required spring force. The cylinder and the freely moving piston inside have an integrated damper mechanism and allow you to slide up and down softly . Thanks to the conical plug connection, this spring can be used with almost every common office or desk chair - Especially at permanent or high load! The gas pressure spring is easy to install , has a long service life and a max. load capacity of 180 kg (395 pounds) . Product advantages: Highest quality class: Class III Easy installation Conical plug connection Steplessly adjustable Excellent lifting characteristics High reliability High load capacity Long service life Technical data: Torque: 400 Nm Material: Metal Max. length: 35,5cm / 14 in Cylinder Ø bottom: 4,3cm / 1.7 in Cylinder Ø top: 5cm / 2 in Piston Ø: 2,8cm / 1.1 in Height adjustable to 15,5cm / 6.1 in Load