Description:Material: Made of aluminum alloy, 304 stainless steel, durable, anodized, bright color

Note: 31

8mm seatpost clamp fits OD 27

2/28

6mm bicycle seatposts; 34

9mm seatpost clamp fits OD 30

4/30

8/30

9/31

6mm bicycle seatposts

Easy Installation: Easy to install on bike with locking threaded nutLightweight: Lightweight design and small size doesn't take up space and looks beautifulSuitable for: road bikes, mountain bikes, folding bikes, track bikes, fixed gears, etc

Specification:Material: Aluminum Alloy, 304 Stainless SteelPackage Includes:1 Bikes Seat Post ClampNote:Please allow slightly errors due to manual measurement and different monitors