hello， welcome to our warehouse.<br /><br /><br />the handlebar clamp diameter.:31.8mm<br />material:3 k full carbon fiber + aluminum alloy<br />the diameter of the clamp bracket.:28.6<br />description of the product:<br />diameter range: 28.6mm<br />31.8mm diameter handlebars.<br />length: 60 / 70 / 80 / 90 / 100 / 110 / 120mm<br />weight: 118 - 140g<br /><br />please tell us what format you need. thank you