MOTM

Looking at Mouser for replacement 800ma/250V SLO-BLO 5mm x 20mm fuse, I 
see three choices (current catalog page 591): Series 215, 218, and 239.  
Which is the correct part.  And what's the difference, besides cost 
($1.23, $1.99, and $0.75 in single quantity, respectively)?

I haven't blown a fuse.  Just looking for similar parts.

Thanks,

Richard Brewster
http://www.pugix.com