Dt swiss D232 Dropper Post 27.2mm 400mm Black Aluminum 0mm 416g 60mm 90mmDeveloped for cross country riding and racing Upside down technology allows for a very robust release mechanism The fully mechanical system is highly reliable and has no need for bleeding due to the release being driven by a spoke Tool free maintenance can be performed quickly without removing the post from your bike Quick release actuator allows for easy assembly and disassembly Aluminum seat tube and saddle clamp L1 Remote, cable and housing