Check Hunter web site
The "Tech Questions" page on Hunter's web site says:What do you do to repack the stuffing in shaft boxes?When repacking stuffing for prop shaft boxes use1/4" packing on plastic stuffing boxes3/16" on bronze stuffing boxes with 1" shaft5/16" on bronze stuffing boxes with 1 1/4" shaftMy 84H34 has a 1 inch shaft.Tom