Frame consisting of an aluminum star-foot and plastic-covered gas spring mechanism. Available as fixed model with non-adjustable seat height or height-adjustable Lift model.

Chair in fixed height or height-adjustable.

Seat shell made from double-walled, structured polypropylene (LuPo) for comfortable seating with air cushion. With concealed frame attachment and grip hole.

Equipment and options: Plastic glides or 2-component universal glides; castors for hard and soft floors. Optionally available with foot ring and with particularly easy-to-use 3D rocker mechanism. Model 31505 with reduced weight gas spring mechanism suitable for children. With piggyback hook for chair suspension on tabletops.

The following material groups are available to choose from: Frame made of steel tube: M1; Seat and backrest: C1.