1) U Bolt w/hex nut, flast washer 2) Stainless Steel T304 3) Stainless steel carriage bolt, coach bolt, cup square neck bolt 1) U Bolt w/hex nut, flast washer2) Stainless Steel T3043) Stainless steel carriage bolt, coach bolt, cup square neck bolt4) Size(mm): 5, 6, 8