Product Information:Suspension seatpost springs, Bicycle seatpost springs, Bicycle accessories for all SR Suntour NCX suspension seatposts, Length 6.2in/15.8cm, Diameter 0.74in/19mm Scope of application:Universal seatpost spring for all SR Suntour NCX suspension seatposts, used as a replacement shock absorber spring inside the suspension seatpost and reuse the original spacer inside. Function: Seatpost spring that absorbs bumps during rough road rides, provides a smooth ride and enhances rider comfort. Material: Made of high quality steel, sturdy and durable, with a maximum load capacity of 95Kg (209lbs) Installation: Remove the bike suspension seatpost, take out the spring in the seatpost, install the spacer on the old spring on the new spring, put it into the seatpost, the installation is complete.