27.2 mm tube diameter, 

350 mm length,

20 mm set back.

weight 222g 

Comes supplied with a FSA Di2 internal battery mount so can also be used with Shimano Di2. 

The new SL-K SBS SB20 seatpost is lighter and stiffer than ever. Just 222 grams for the 27.2 x 350 length. Using a UD carbon shaft with a bonded alloy head and sophisticated 2 bolt SBS clamp design, FSA believe they have achieved what they believe is the finest seatpost yet.

Please  take a look at my other listings for quality vintage bicycle parts and many new or NOS parts. More than happy to combine postage where possible.