seat post material :T1100 carbon

seat post length :350mm

seat post diameter:27.2mm

seat post angle: 0mm offset and 25mm offset

seat post can fit the saddle: round rails and area rails

The seat post parts have two size: 7*7 and 7*9

7*7 is for round rails saddle parts,7*9 is for area rails saddle parts.

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