1.material: gr1,gr2,gr3,gr5,gr7,gr9,gr12 2.standard:astm b381,ANSI B16.5,DIN2630-2636,GB/T9116 ... .QUALITY CONTROLLultrosonic testing and material quality reportPACKAGEPlywood case line with foam or as your requirementChoose our flange,Choose high quality and ... satisfaction!welcome you to buy our flange.hope cooperate with you! ...