Features:High performance lightweight and stiff 2014 alloy seatpost,One-piece seatpost made from 2014 alloy tubing with a 3D forged head for increased strength and durability,Easy to use secure single bolt side clamp design made from 2014 forged aluminium,2014 alloy is commonly used in the aircraft industry and a wide variety of high strength engineering applications making it the ideal choice to produce this lightweight, strong and reliable head and clamp assembly,Handy height-indicator on the rear of the shaft for quick setup,in-line, zero offset clamp,Di2 internal battery compatible,Weight from 235 grams.