Fsa energy sl 250 seatpostthis versatile seatpost is engineered for off road riding and features a 3d forged alloy construction for exceptional stiffness and strength. Fsa has also put this model through a cnc machining process, which shaves off any excess material, so riders can benefit from maximum durability without any unnecessary weight. Another highlight is it comes equipped with a sturdy two bolt clamping system, which provides a safe and secure hold to your saddle rails as you take on unpredictable mixed terrains. Weighing in at only 260g, this is a great choice of upgrade for cross country xc and mountain bike mtb riders who want light and reliable performance, wherever their next adventure takes them.features seatpost material 3d forged and cnc machined al6066 alloy hardware material chromoly crmo steel use xc, mtb diameter 30.9mm length 350mm manufacturer's part number 192 1642 weight 268g approxbuy fsa components from chain reaction cycles, the world's largest online bike store.