Frame consisting of an aluminum star-foot and plastic-covered gas spring mechanism. Optionally available with armrests and plastic cover.

Seat and backrest shell manufactured using a monosandwich process. Made from polypropylene with a hard core and fiberglass content. With a flexible outside and edge area to prevent uncomfortable pressure points when sitting. Optionally with a tightly upholstered seat and backrest area.

Equipment and options. Glides or castors for hard or soft floors or 2-component universal glides. Optionally available with foot ring or with particularly easy-to-use 3D rocking mechanism with sideways tilt capability. With piggy-back hook (models without armrests) for suspension of chair on tabletops.

Model Plus for raised sitting/standing workstations with castors that lock when subjected to weight and a height-adjustable foot ring that can be adjusted in 1/8 inch increments.

The following material groups are available to choose from: Frame made of steel tube: M1; Seat and backrest: C7; Fabric cover: S46,51,52,64,74,76,78,79,80,82.