KIRK Monopod Head MPA-2N The model number is MPA-2N3, I believe, but I've disposed of the box and have forgotten the exact model number. The items for sale are only those shown in the images. There is no box or instruction manual. I used this with 400mm and 600mm lenses. Even when moving the monopod with the lens and camera attached, it remained perfectly stable. During shooting, the release is activated by simply turning the knob slightly, so you won't miss any photo opportunities. If you're looking for a monopod head, I think this product is the best. To prevent any swapping, returns and claims are not accepted.