Product Specification Construction : made of steel pipes and steel sheet, can be folded with spring mechanism. Backrest : adjustable by rack mechanism and can be set in 5 positions (max.75 degrees. Sideguard : made of steel pipe and laminated with flexi-foam. Mattress : covered with wool or synthetic leather. Castors : 7 castors 2", three with locks, two swivel-castors 360 degrees and two fixed castors. Painting : epoxy powder coating finished.