Pro-Tek LL-55 - Lowering Links CNC machined from 7075 T6 Billet Aluminum and anodized to protect from corrosion and oxidation Lower the frame for easier mounting and control for smaller riders Increase aerodynamics for speed and performance Link Specifications: Length 9", Center hole to first center hole 7 3/8", Center hole to second center hole 8 1/16" Comes with two settings that lower rider height 2 inch or 4 inch