We use a Curt Q5, 20k capacity with slider. It is a good, dependable unit that is easy to hitch and the slider works well. I like the positive latch and visual indicators that tell you it is locked. Only problem I have had was a broken on one of the rollers and the factory sent a replacement at no charge. However, it is so heavy I have difficulty in removing it when I need the bed clear to haul stuff.