This simple and beautiful Niner seatpost is left over from a run of bike builds. We only have one left in stock and we're closing it out. It's 27.2mm in diameter and 400mm in length. The shaft and head is constructed of 7075 T6 heat treated alloy that features a beautiful burnished finish over a black anodized treatment. The lightweight composition works well with the durable design and offers a seatpost that rivals many carbon products.