The thomson covert 150mm dropper seatpost the covert dropper post is built for bikes that utilize internal housing and cable routing for dropper posts housing and cable exits the bottom of the post and does not move when the post moves covert droppers cannot be converted to external cable models and existing external cable droppers cannot be converted to covert thomson covert 150mm dropper seatpost features size 309 x 400mm travel 125mm includes bar mount rem