The Ritchey Comp Zero Carbon post offers no-slip saddle engagement and high adjustability by securing the rails with fore and aft bolts. Whether you're hitting rough singletrack or remounting in a hurry, this ensures the saddle stays exactly where you want it.Item Specifications-Clamp Style:Standard Rails-Color:Black-Defined Color:Black-Diameter:30.9-Length:400-Material:Carbon-Offset (mm):0