The forged aluminum bracket offers solid, easy-to-use construction alongside an industry-leading fit range. It is also compatible with our riser kits. The bracket is designed for 31.8mm bars and 22.2mm extensions in aluminum or carbon. - Materials: Forged 6061-T6 AL - Stack Height: 42.6mm - Width Adjustment: 37mm - Basebar Clamp Diameter: 31.8mm - Extension Clamp Diameter: 22.2mm - Weight: 234g