This even more stringent B&W 58mm 420 UV-Blocking Glass Filter (Slim) behaves like the B&W 415 UV-Blocking filter except that its filtering slope completely blocks the UV radiation all the way into the visible violet region. As a result, it has a noticeably yellow tint.
B&W slim filters are for wide-angle lenses and are 3mm thick. They do not have a front thread.
Stronger than a B&W 415 UV-Blocking filter