Drilled Rubber Stopper

$1.19
Size:
#3
#5.5
#6
#6.5
#7
#8.5
#9
#10 (1/2")
#10.5
#11
#11.5
#12
#2
#7.5
#8
#9.5
#13

Rubber stoppers with a hole drilled in the center, perfectly sized to accept airlocks.

Glass Carboy: Use #6.5
Plastic PET Carboy: Use #10.5