Truvativ St Holz 318 40 1-1/8 Bxred Bike Parts Fr/DH stem with a lighter design and updated styling 3D-forged and machined 6066 aluminum with an opposed 2-bolt steered clamp and a 4-bolt window-profile faceplate, all with crmo steel hardware 42mm (1-1/8") or 50mm (1.5") steered clamp stack height: 190G (40mm)