Properties of the model: Upholstery Genuine leather Armrests Metal with leather pads Tilting mechanism Enchanced comfort tilt control mechanism with locking position Support cross Plastic with leather pads, Ã? 740 mm Gas lift Enlarged diameter, Germany DIN 4550 4rd class Castors BIFMA 5,1 standard (US). Rod diameter 11 mm. Frame Nomonolith Stuffing Standard polyurethane foam 25-40 kg/cu.m. Recommended maximum load 250 kg. Warranty 2 years