The EA70 aluminium seatpost features a sleek and low profile design of the seat clamp mechanism, it is superbly stable with ample saddle travel in the lock mechanism.the EA70 TaperWall aluminium seatpost body is connected to a durable integrated seatpost lock head with two screws. The seatpost is available in zero or 20mm offset for a great seating position on your bike.surface finish: black anodization Weight: 270g (31.6mm) Offset: 20mm/0mm Length: 350mm/400mm Diameter: 27.2mm, 30.9mm Material: EA70 ALLOY