Hydrofoil Rack bolts, 3/8-16 x 1', or 3/8"-16 x 1.25". These are the bolts that attach the rack to the adapter, as well as the rack arms to the faceplate for both the Comptech pivoting & fixed hydrofoil racks. The length will depend on which rack you have and where they are being used. Priced as 1 set of four bolts, please choose which size you need when adding to your cart.