... stiffness 4,EN standard 2013 Full Carbon Bicycle Seat Post, Diameter 27.2mm, 31.6mm,Detailed information of the product:Made of Toray ... T700 high modulus carbon fiberMonocoque constructionOuter diameter: 27.2/31.6mmLength: 350mmWeight: 200gFinish: 3K, UD gloss/mattAfter you ... not covered by warranty. 2013 Full Carbon Bicycle Seat Post, Diameter 27.2mm, 31.6mm