Rubber Stopper - Drilled For Airlock

Rubber stopper with 3/8" airlock hole 

Size 2: Fits beer bottles and wine bottles 

Top Diameter: 21mm
Bottom Diameter: 17mm
Length: 26mm

Size 3: Fits PET Soda Bottles 

Top Diameter: 24 mm
Bottom Diameter: 18 mm
Length: 25 mm

Size 6: Fits 1 gallon glass jugs, 64 oz growlers

Top Diameter: 1 1/8"
Bottom Diameter: 1 1/16"
Length: 1"

Size 6 1/2: Fits 3,5,6,6.5 gallon glass carboys

Top Diameter: 1 3/8" 
Bottom Diameter: 1 1/8" 
Length: 1"

Size 7:

Top Diameter: 1 7/16" 
Bottom Diameter: 1 3/16" 
Length: 1"

Size 8:

Top Diameter: 1 5/8" 
Bottom Diameter: 1 3/8" 
Length: 1"

Size 8 1/2:

Top Diameter: 1 11/16" 
Bottom Diameter: 1 7/16" 
Length: 1"

Size 10:

Top Diameter: 1 15/16" 
Bottom Diameter: 1 5/8" 
Length: 1"

Size 10 1/2:

Top Diameter: 2 1/16" 
Bottom Diameter: 1 3/4" 
Length: 1"

Size 11:

Top Diameter: 2 1/4"
Bottom Diameter: 1 15/16"
Length: 1"