The hydraulic components seatpost Switch SW-09 is particularly suitable for those who want a telescopic seatpost but does not have the frame prepared for the cables passing inside. The terminal of the drive seat, positioned in the lower part, means that during the sinking the cable always remains firmly in place, this ensures a greater fluidity and a smaller footprint. The operation of the seat post is entrusted to a sealed hydraulic cartridge that greatly facilitates the eventual maintenance.