Ruifu Aluminum Alloy Lightweight Quick Release Seatpost Clamp Easy to Install 31.8 34.9mm (Blue, 31.8mm)

Material: aluminum alloy Weight: 31.8mm approx. 39g, 34.9mm approx. 41g [Easy to install] Quick release type. Easy to use, easy and convenient to install and use. Scope of application: Bicycle seat clamp (inner diameter 31.8mm) can be installed on 27.2/28.6mm seatpost. Seat clamp (34.9mm inner diameter) can be installed on 30.4/30.8/30.9/31.6mm seatposts.