Thomson Covert Elite Dropper Seatpost - 31.6 100mm Black InternalThomson Covert Elite Dropper Seatpost 31. 6 100mm Black Internal. The Covert Elite Dropper seatpost includes a new shifter oriented remote lever for easy operation. The cartridge based system is designed to have the longest service life in the industry. If repair is needed its fast affordable and simple. Every part that makes up the Covert dropper is carefully chosen and of the highest grade quality available. Custom made Norglide bearing bushings and