Integrated T25 hardware with rounded heads prevents injury Forged and CNC cut from 6061 alloy, bead-blasted then black-anodized, then laser-etched with logos and convenient bar angle indicator markings Clamp is ideal for strength to weight ratio 35 mm bar clamp diameter, 1-1/8" steerer clamp, 40 mm steerer clamp stack. STEM 40MM LENGTH BASE BLK