Deda elementi super zero seatpost new superzero seatpost with a carbon monocoque construction for a very light weight the 2 bolts head clamp system has been completely re designed for a quick and precise saddle adjustment features material ud full carbon constructionlength 350mmdiameter 272 and 31 6mmsetback 21mmweight 216g 31 6mmfinish carbon udcompatible with deda adapter for di2 internal batteryall deda seatposts are compatible with 7mm round rail or 7x8mm oval shaped railbuy