CONSTRUCTION Metal-framed seat/back (with steel mesh & springs on the seat and elastic webbing on the back), overlaid with injected polyether foam. The cover is held in place by gripper strips, and is therefore removable. This chair has a choice of 4 different types of feet : – ‘sleigh’ feet in brilliant-chromed steel wire (diameter 11 mm). – square-section tubular steel feet 20 mm x 20 mm. – circular base comprising a brilliant-chromed steel base (diameter 50 cm) and a shaft which pivots 360 °. – 5-branch base in brilliant-chromed tubular steel base, each branch having one castor. This base is also telescopic (seat height variable between 43 & 52 cm). The bridge chair always has ‘sleigh’ feet in brilliant-chromed steel wire (diameter 12 mm).