This seatpost is constructed of ultralight and durable CNC 6061 aluminum alloy. It is suitable for road and mountain bike.<br><br><strong>Features:</strong><br>Constructed of ultralight and durable CNC 6061 aluminum alloy.<br>Exquisite workmanship， nice touch feeling.<br>Easy to install.<br>Suitable for road and mountain bike.<br><br><strong>Specifications:</strong><br>Material: Aluminium alloy<br>Color: Gold / Titanium / Red / Blue / Black (optional)<br>Diameter: 27.2mm / 30.9mm / 31.6mm (optional)<br>Length: 350mm / 13.8in<br>Weight: Approx. 188-235g / 6.6-8.3oz<br><br><strong>Package List:</strong><br>1 * Bike Seatpost