The ones I purchased from Nashbar were the LDT rack and the ATP2 panniers. They no longer carry the ATP2 pannier but the similar model is the Rear Touring Panniers. i got the bigger one as it holds a laptop and tablet without any problem with my clothes for work. To hold the rack on at the bottom I used a P-Clamp with the rubber grommet that you get at any hardware store to hold the base as my braised on fitting cracked after 18 months. Personally I think the P-Clamp is a better idea to begin with.