Bulk Seal Set, 5pcs for; MET -6 [9/16-18], MIT -8 [3/4-16], -8 [13/16-16], HPB -6 [9/16-18], FX -6 [9/16-18] , [5/8-18], 60 -6 [9/16-18] , [5/8-18], Buna-N material. - S1012B70