88 and 33 are I believe identical except for thickness. 88 is thicker.. In the old days 88 was considered "telephone tape" and 33 "electrical tape. We always had 88 T....which I understood was "telephone". Don't see the T suffix any more. 73 bob de w9ge Phil Clements wrote: > >88 is the top grade; great for taping coax. connections. > > > >