[Pete Munroe]

Thanks for the response. Never knew why the old glass tube type were dropped about 1981 for new production automobiles...makes sense, and gosh the colors are so koool..........

OK, sticking to the glass tube type...LOOK at the ELEMENT in side the glass tube...

1. in a OLD TYPE "unlabeled glass fuse"...(which ACTS like a SLO-BLO but was NEVER LABELED SLO-BLO) the elements I see are usually ~1/8th inch wide lead strip notched in the middle.

2. in the NEW type SLO-BLO fuse...now PROMINENTLY LABELED "SLO-BLO"...the element is a twisted wire...I am guessing the wire is LEAD FREE.

The new type SLO-BLO at first glance looks VERY similar to a FAST BLO fuse...both use a wire element. But if you look close the new SLO BLO "lead free" element wire is TWISTED and a heavier gauge wire than a FAS-BLO.

To keep the newer wire style element SLO-BLO from being mistaken for a "FAST BLO" fuse they felt the SLO-BLO label was now necessary...just my guess.

Man this got too complicated...sorry about that.