These dropper posts from TranzX provide precise operation, adjustable rebound speed (via air pressure), and quality construction at a wallet-friendly price point. Get the same performance and reliability of some of the most popular dropper posts out there at a fraction of the cost.These are OEM spec posts so they'll come in plastic wrap rather than a fancy branded box.Who's this item for: Savvy shoppers will know a great bargain when they see one! These posts are suitable for use on XC, Trail, and Enduro bikes.Actuation style: Mechanical actuation with the barrel end of the cable attached at the dropper end and the loose end of the cable clamped at the lever.Spring style: Replaceable air cartridge - return speed is adjustable via air pressure (valve located underneath saddle clamp).Infinite or finite adjustments: These are infinite adjust posts which means that you can put the post all the way up, all the way down, or anywhere in between.Internal or externally routed: Internal/stealth cable routing.Lever included: Yes, there is a 2x-friendly lever included but the posts are compatible with any brand/model that clamps the loose end of the cable at the lever end.Lever mounting options: The included 2x-friendly lever has a 22.2mm bar clamp.Includes cable / housing / battery: Yes, there is a cable and housing included (see below for more info).Saddle clamp style: Standard 2-bolt micro-adjust.Weight: (excluding cable set 90g) 30.9 x 150mm: 535g 31.6 x 150mm: 555g What's in the box: Dropper seatpost Cable housing Cable Cable end cap 2x-friendly dropper lever with 22.2mm bar clamp and barrel adjuster. Barrel nut for 2x remote Barrel nut for dropper post Assembly and user guide