Iron, Aluminum

UNIVERSAL: Bicycle Seat Post is suitable for most MTB Mountain Bikes Bicycle.PRODUCT INFORMATION:Material: Aluminum Alloy, IronColor: BlackThickness: 2.5mm / 0.1"Dimension: 500x31.8mm / 19.69"x1.25"(L*D)Hole Size 1: 31.8x28mm / 1.25"x1.1"(OD*ID)Hole Size 2: 22x18mm / 0.87"x0.71"(OD*ID)PERFORMANCE:Usually made of aluminum alloy and iron materials, they are portable and durable and can withstand the bumps and impacts of mountain riding.The seat tube post is equipped with a shock-absorbing device inside, which can effectively absorb and reduce the vibration and impact generated during riding, improving riding comfort.The seatpost post usually has an adjustable feature that can be adjusted according to the rider's height and riding habits to obtain a more suitable riding position and comfort.