The Farfi Bicycle Quick Release Seatpost Seat Tube Clamp is made of high hardness aluminum alloy material, ensuring strong wear resistance. It features an anode surface treatment process and is equipped with a quick release lock design. The hollow design makes it lightweight and easy to carry.This seatpost clamp comes in three specifications for you to choose from. The 28.6mm seat tube clamp is suitable for 25.4mm seat tubes, commonly used for road bikes or fixed gear bikes. The 31.8mm seatpost clamp is suitable for 27.2mm and 28.6mm seat tubes. The 34.9mm seat tube clamp is suitable for seat tubes such as 30.4mm, 30.8mm, 30.9mm, and 31.6mm.With its quick-release locking mechanism, this seatpost clamp is not only durable but also lightweight. It adds a touch of style to your bike and makes it easy to adjust the height of the seat post. The Farfi Bicycle Quick Release Seatpost Seat Tube Clamp is a must-have tool for any cyclist.Package Includes: 1 x Seatpost ClampKey Features:Made of high hardness aluminum alloy materialAnode surface treatment processQuick release lock designHollow design for lightweight and easy carryingSuitable for various seat tube sizesDurable and lightweightAdds style to your bikeEasy to adjust seat post height