Used DEGNER expandable seat bag made by DEGNER. This is a good option for those who don't want to attach a rear box. It's small and compact when attached, and you can increase the capacity when you have more luggage. In the 9th reference photo, a "Simpson M30" fits in with room to spare. *Also listed on Yahoo! Auctions, so the listing will end when a bid is placed. *I try to ship as quickly as possible, but please understand that there may be some delays due to my day job. *Local pickup is also possible, so please inquire if you are nearby.