From HD web site:
The Rolling Touring Bag is our largest bag and is ideal for a cross-country trip. Equipped with smooth rolling sealed ball-bearing wheels and a locking push-button 2-stop extension handle, this bag is easy to move from the bike to the hotel. The Rolling Bag features large exterior pockets with glove-friendly, ergonomically contoured zipper pulls and an oversize custom handle. The innovative spandex mounting pocket makes installation and removal a simple process. Just slip the smooth, low-profile band over the passenger backrest for a snug and secure fit and cinch the bag in place with the adjustable mounting straps. The spandex material reverts back to its original shape when the bag is removed for a first-class look when you are checking in to the hotel. Bag and integrated rain cover feature 3M™ Scotchlite™ reflective piping and graphics for added visibility. Luggage. Rolling Bag features 2 zippered exterior side pockets, 1 zippered front pouch with mesh pocket and a large interior space with 1 zippered mesh pocket. Dimensions: 18.5" W x 10.5" D x 18.0" T. Luggage capacity: 3100 cubic inches.
Part Number: 93300008
I paid about $300 new and used it twice before I had to sell my bike. Asking only $175. I'll meet you for the exchange.
Here's a video about the bag:
https://www.youtube.com/watch?v=ux8qjv_ggD8