I am very thankful that Neewer sold these, the one that came with my Neewer rig weighed only 1kg and because the Nikon P1000 was so heavy with glass in the lens I had to do the entire installation wear. with my arms and shoulder muscles, which was painful. Very grateful to have the blue model of this back in stock to match my setup. Hopefully a total weight of 2kg will balance the camera but if not I can use another 1kg weight on the rig. Neewer, thank you for your products, they have helped me