Inquiry no more valid, the customer has already fulfilled the order THREADED STUD BOLTS UNI 6610 WITH HEXAGON NUTS UNI 5587 MATERIAL: ASTM A.320 GR L7/ASTM A194 GR 4 M12X50 NR 130 PCS M16X70 NR 180 PCS M20X85 NR 320 PCS MATERIAL ASTM A193 GR B7/ASTM A194 GR 2H ANSI B16.5 M10X45 NR 20 PCS M12X55 NR 350 PCS PLEASE INCLUSIVE CERTIFICATE 3.1B