... 2. on-time delivery 3.lightweight 31.6 mm Full carbon bike seat post, bicycle parts ♦ Pass EN Test.♦ 180g±6g Shipping ... : door to door service, by DHL/EMS/UPS , usually take 3 ~ 5 ... , or similar activities) is not included in the warrant range. Carbon fiber bicycle seat post, 3k,12k,ud