This is a PDW Bindle Rack. I used it once to carry a chair when I went on a short coffee ride. I handled it with care, so there are no scratches or damage, and it's in very clean condition. The accessories, such as spare straps, bolts, and seatpost protection stickers, are unopened. The specifications are as follows: ● Easy to install with a 5mm Allen key ● Structure that prevents the bag from swaying even when the bike is rocked side to side ● Can be mounted on seatposts from 27.2-31.6mm (not recommended for carbon fiber seatposts) ● Total length 432mm, weight 370g ● Load capacity: 5.34 kg This is the "BINDLE RACK" from "PORTLAND DESIGN WORKS," a bicycle accessory brand from Portland, USA, the city of bicycles. It's a seatpost-mounted rack designed to easily carry gear such as tents, sleeping bags, and dry bags, as well as for cycling. The rack is made of lightweight alloy and can be attached to any size seatpost in seconds. It can be installed even if the clearance between the seatpost and the rear wheel is narrow, preventing the wheel from rubbing. By securing the load with the included sturdy straps that pass through the saddle rails, there is less side-to-side movement when installed, allowing for a smooth ride. The side-open design makes it easy to attach and remove bottles. You can carry various items, such as shoes and small sleeping bags.