1) HRK-Bolt (button head) M16x27 4.6 set (bolt,nut,washer) 3.1 certificat 1800 – pcs. 2) HEXAGON Head -Bolt M10x45 4.6 set (bolt, nut, washer) 3.1 certificat 100 – pcs. galvanized carbon steel PICTURE ENCLOSED Certificate we need : 3.1 certificate.