Zipp Service Course seatpost features an innovative low-profile clamp allowing greater for-aft adjustment.It's a post that s lightweight and strong for security and a precise fit at an affordable price.Dual bolt, low profile micro adjust cradle3D forged from a single piece of AL-7050Stainless steel hardwareMinimum insertion length is 90mmItem SpecificationsClamp StyleStandard RailsColorBead Blast BlackDefined ColorBlackDiameter27.2Length350MaterialAluminumMax Height260Min Height35Offset (mm)0Weight245