Source google image: http://www.velochannel.com/wp-content/uploads/2016/04/tige-selle-zipp-SL-Speed-seatpost-27-2-330mm.jpg
Tige de selle zipp
Source google image: http://www.velochannel.com/wp-content/uploads/2016/04/tige-selle-zipp-SL-Speed-seatpost-27-2-330mm.jpg