Question about SCT materials policy

[Nancy Latta]

Folks,

I have a question about the following new policy regarding SCT materials-

 d. Semiclean B materials (as with semiclean A materials) should use the 
metal-side of tylanfga. 


Is there a non-metal side to the fga tube?  I thought all the boats in 
that tube are in the semiclean metal A category.  Is this perhaps a 
reference to tylanbpsg where we do have metal and non-metal boats within 
the same tube?

-Nancy