My engines all currently have O.S. glow plugs in them #8, The field box I bought from ebay for $26 was full of goodies, starter, elec fuel pump, power panel, plug wrench, some props, glow plugs etc.

There was a box of 24 Fox standard long glow plugs with washers no idle bar, they say long on them. I assume that means reach, are they safe to use in place of a #8 or A3 ? they come up on the tower substitutions for one or the other I do not remember what one.

Thanks all for the help

Yes they will be fine.

I remember them being the standard of comparison many years ago

thank you much, that's one thing i now have plenty of for a while

what size engine? above .40 sized should be fine
where did you get it (actual url i, know from ebay) or was it a 1 time thing? i could use a field box setup about now

The plugs will work fine in any engine larger than a .15 same as a OS 8

a .46 a .55(coming soon) and a.65 here is a pic of the box the guy claims the finish is thinned epoxy, he was getting out of the hobby I offered to pay him more then the minimum he was asking for, I was the only bidder.... because of the offer he tossed a lot of extras in like the plugs and props and tools, I still chat with him time to time

That is a nice box

Very nice box.