Whool 31.6 450mm 580mm MTB Mountain Bikes Road Bicycles Ultra Long Seat Post Sit Tube Parts (31.6580mm) Go to amazon.com Related posts The 10 best 450mm seat post for 2022 FeatureWeight : 450mm 415g 580mm 491gMaterial: Aluminum Alloy DescriptionSize : 31.6*450mm 31.6*580mm Weight : 450mm 415g 580mm 491g Material : Aluminum alloy