The HIGH-TOP V.2 top load stem features a cast aluminum body with recessed sides and bottom section to reduce weight, a counter bore for your compression bolt, and a forged 6061-T6 aluminum top plate with machined FIT logo.SPECS > Reach 51mm Stack Height 32mm Rise 35mm (upright), 3mm (inverted) Clamp Bolts 8×1.25mm (x4) Pinch Bolts 8×1.25mm (x2) Weight 12.15 oz