I had this installed on a Cygnus X 3rd gen, I believe. I used it for about 3 days. It's convenient, but I'm not into having a box, so I'm selling it. I bought the carrier used, and I didn't like the protrusions in some places, and I wanted to move the box closer to the seat, so I sanded it down with a sander. However, I don't think there are any problems with its use. I bought the rear box new. I think the capacity was around 28 liters. It was just right for a full-face helmet, gloves, and rain gear. I removed the manufacturer's sticker and applied a plain black sticker. This is a set sale of the carrier, base, and box. Please install and use it at your own risk. There are scratches, marks, and rust from use, but I think the box is in good condition, but this is just my personal opinion. I will also include the bolts, washers, and spring washers for attaching to the tandem bar. Please let me know in advance if you don't need them. This is a set sale, and mounting bolts are also included, so I think it's a good deal for those considering a rear carrier, so please consider it. For shipping, the carrier and base will be attached, and the box will be used for storage → simple packaging. - Type: Top case - Color: Black - Accessories: Key, mounting hardware - Condition: Used - Damage: Scratches on the bottom