Adapter for using a seat bag with a dropper post. Attached to the top of the seat post, it prevents stanchion wear/damage to the wiper seal and allows for secure installation. During compression, the lower skirt of the product contacts the seal collar first, protecting the seal from damage. Molded from thermoplastic, it is durable, resilient and can maintain its strength down to -20°F/29°C. Ideal for saddle bags that wrap around the seat post. *A dropper travel value of 25mm is required for installation. Compatibility Compatible with internal cable routing dropper posts Compatible with posts with stanchion diameters of 26 to 26.5 mm Thomson Covert/Fox Transfer/KSeTen/One Up...etc Material: DuPont Delrin thermoplastic resin Weight: 19g Specified torque: 2 to 3N