I opened the package, but the item is new and unused. There are no scratches or missing parts. I'm selling it because I no longer have a use for it. The sixth photo shows the mounting bracket for the seat post. Installation is best on round steel or aluminum pipes; carbon or irregularly shaped seat posts should be avoided. The frame is made of aluminum and can stand on its own even when removed from the bicycle, and can also be used as a hand-pushed carrier. The upper handle can be adjusted to an easy-to-grip angle. - Model Name: PORTUS COMET V2 - Color: Black - Material: Aluminum - Usage: Cycling, Camping - Compatible Sizes: 20 inches to 700C I will repack it in the original box for shipping. Please allow some time for shipping. Thank you for looking.