The tube fitted to the scope perfectly but sadly the forward end was out of round. This did not affect the installation of the scope on my Whitworth rifle but it meant that the front brass cover would not thread on to it. I immediately contacted Hilux who promptly offered to replace same.
I bought this to use with the Malcolm 6X 18 inch Short Scope because I needed a slight increase in tube length in order to attach the front mount on my Lee-Speed. It works perfectly for this purpose.
Fits great thanks