Features:1. Made of high quality aluminium alloy with exquisite workmanship, which is smooth, lightweight, durable and wearresistant.2. The inner diameter of the clamp is 34.9mm, fit for 30.430.831.6mm bike seat post.3. Simple and convenient design, easy and quick to install.4. Suitable for most types of aluminum frame bikes, like mountain bike, road bike, etc.5. Available in 5 colors, you have more choices.Specifications:Condition: NewItem Type: Bicycle AccessoryMaterial: Aluminium AlloyOptional Color: Black, Red, Blue, Gold, TitaniumDiameter: 34.9mm 1.4inchFit For: 30.430.831.6mm seat post(the bicycle should be aluminum frame)Weight: Approx. 25gPackage Include:1 x Seat Post Clamp.wangedittext{fontfamily:'Arial'important;}.wangedittext table {bordertop: 1px solid000;borderleft: 1px solid000;}.wangedittext table td,.wangedittext table th {borderbottom: 1px solid000;borderright: 1px solid000;padding: 3px 5px;}.wangedittext table th {textalign: center;}Note:Only suitable for aluminum alloy frame, carbon fiber material cannot be used. 1Made of high quality aluminium alloy with exquisite workmanship, which is smooth, lightweight, durable and wearresistant 2The inner diameter of the clamp is 34.9mm, fit for 30.430.831.6mm bike seat post 3Simple and convenient design, easy and quick to install 4Suitable for most types of aluminum frame bikes, like mountain bike, road bike, etc 5Available in 5 colors, you have more choices