For saddles with saddle loops, this rack allows you to pre-attach a bag, hook it onto the saddle loops, and secure it to the seatpost with the included belt. Made of steel. Depth: 12cm Weight: 330g Weight capacity: 10kg While it has been installed and used, there is no paint peeling, and it is in very clean condition. Please understand that this is a used item before purchasing. Thank you for looking.