Magnepan fuse voltage

Help; the serial number plates on the back of my Magnepan 3.6 R's say to use 5amp fuses. Is that a 250 volt or a 32 volt fuse?
Post removed 
They come with 250V fuses.
Stickman - you need to use 5A and 3A large, fast blow fuses on your Maggies. The voltage rating is of no concern as long as it is a value of at least 250V. Enjoy!
Well, that most likely explains why I have been blowing fuses! I have been using 4 Amp 32v fuses.

Thanks for the info.
From Bussmann

If you are popping 32v fuses, you are playing LOUD......especially given the time constraints as noted in the above pdf.....
Finally got this corrected! As Jwp says above, the correct mid-range fuse for my 3.6's are 5 amp, 250 volt; haven't had any issues with blown fuses since I installed the 5 amp.