Troll:
I did not check Oregon's site, got the info from Bailey's (and perhaps faulty memory from my goof with non-NK bar and NK chain from Baileys for my 51).
For small mount Husky:
18" Micro-Lite PRO =
http://www.baileysonline.com/itemdetail.asp?item=ORF+180MPBK095&catID=
18" Micro-Lite =
http://www.baileysonline.com/itemdetail.asp?item=ORF+180MLBK095&catID=
I think I see where I got confused, the verbiage in Bailey's sort of contradicts, talks about using with NK chain on the PRO but does not mention NK chain on non-PRO.....but the main body of the writeup on the links above are both the same , or virtually, and I skipped down to the chain portion. Think I will mention this to Grande Dog.
Dan, it appears Saw Troll caught my goof, I stand corrected.