This is a used, NL, 27.2, Black Aluminum, Adjustable, Suspension Seatpost. It seems that it was made by Kalin. It is about 10 1/2 inches long from the bottom of the attachment area to the bottom of the post. About 1 1/2 inches of that is the flexible rubber hood covered area. There is about 4 3/4 inches of adjustment area above the 3 inch minimum insertion line. It weighs in at about 485 grams. There is a 2 inch faded area on the post. There is a 6 mm Allen adjustment on the bottom of the post and a 6 mm lightly rusted seat adjustment bolt. The Seatpost has been disassembled for shipping. This Seatpost came off of a 2007 Trek 7.2 FX Hybrid Bicycle. Unfortunately there are no instructions included. Carefully packed with recycled materials. Always Ride Safely!