Size 10 Drilled Rubber Stopper 1 15/16 x 1 5/8

Pure gum stoppers with inch hole to accept airlock. Fits Better Bottles.

Pure gum stoppers with inch hole to accept airlock. High quality soft gum rubber for a solid seal. Sizes are listed in inches. Sizes 2, 6.5, 7, 7.5 and 10 always in stock. Other sizes may be delayed 2 weeks. No. 10 fits the Better Bottle opening.