I am trying to order a the seal for my sunroof. (84 wolfsy).  There are two
options: a sunroof seal & a sunroof beading.  What is the difference in
these items? Rocky Mountain was not very helpful.  Currently my sunroof is
sealed with caulk & I cannot open it to take a look. Bently (section 60) was
not helpful.

seal, sliding roof, Vanagon, $109.95, #253 877 223
sliding roof beading, Vanagon $39.95, # 253 877 349

Thanks!
Matthew