Design for mountain bike that make your bicycle more convenient to adjust the seat post.<br /><br />Features:<br />Aluminium alloy material? high quality? long service life.<br />Convenient design? simple installation.<br />Suitable for 30.8mm and 31.6mm seatpost.<br /><br />Specification:<br />Material: Aluminium alloy<br />4 Colors: Blue? black? red? gold (optional)<br />Size:34.9mm? 31.8mm (optional)<br />Diameter: 34.9mm / 1.37in<br />Item weight: 39g / 1.40oz<br /><br />Package includes:<br />1 * Bike quick release seatpost clamp<br><img src="//img.tomtop.com/product/xy/2000/2000/p/tt/y/0/y0301b1-2-8189_1_.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/tt/y/0/y0301b1-3-8189.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/tt/y/0/y0301b1-4-8189.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/tt/y/0/y0301b1-5-8189.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/tt/y/0/y0301b1-1-8189.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/tt/y/0/y0301b1-6-8189.jpg" /><br>