Ritchey WCS 4-axis Stem: 90mm; 31.8; 73/107d; Black 3-D Net forged from 2014 alloy for superb strength-to-weight Specially designed forged and contoured 4-bolt faceplate for use with today's lightweight, oversized carbon and alloy bars Bias cut clamp slot for a more secure, pinch-free hold of alloy and carbon steerer tubes Taper head stainless steel M5 bolts 42mm stack height 120 grams