Rubber Stoppers, with Airlock Hole

#2 Stoppers fit beer bottles and wine bottle

#6 Stoppers fit glass one-gallon wine jugs

#6.5 and #7 Stoppers fit 3, 5, 6 and 6.5 gallon glass carboys

#8 Stoppers fit glass cider jugs

#10 Stoppers fit 3, 5 and 6 gallon PET carboys

#11 Stoppers fit 14.5 gallon glass demijohns

#11.5 Stoppers fit most oak barrels