Fitness stool. Stepless seat height adjustment with Toplift (LGA tested) via ring release lever under the seat. Horizontal oscillation effect due to special depth springing. Horizontal oscillation effect individually adjustable by pressure regulation in the air cushion foundation. Polished aluminium base plate with tubular tyres. Air pump is included in delivery. This model bears the GS mark of the LGA Nuremberg and fulfils all safety-relevant requirements in this connection.