... TreatmentPUMaterialmetal and leatherCertificateBIFMA,SGS,TUV authentication certificatePacking1.One piece with one bubble pack , ten pairs per carton2.CBM ... paper, suitable for export standardUsageWidely use in swivel chair, office chair, mesh chair etc. PaymentL/C or T/TDelivery20-30 days ... first", all items we produced have been in accordance with the American BIFMA, SGS, to achieve the best quality ...