High quality hardware for mounting your seat to the side mount brackets.
Threads are M8x1.25 which works with Sparco, OMP, Momo, and more. Kit includes 8 bolts: 4 in 16mm length and 4 in 25mm length, and you can use the length that works best for your side mount bracket's thickness. Also includes 4 washers and 4 nylock nuts.
Bolts may be silver or black, depending on availability.