Question 1

What size would I need for 20mm bottom and 30mm top?  A sizing chart would sure be nice.

Accepted Answer

I use a chart I found on online, but it is in inches. Perhaps you can convert them to mm?Stopper Size	Bottom Diameter (Inches)	Top Diameter (Inches)	Avg. Diameter (Inches)#2	5/8	3/4	11/16#3	11/16	7/8	13/16#5.5	15/16	1-1/16	1#6	7/8	1-1/4	1-1/8#6.5	1	1-1/2	1-1/4#7	1-3/16	1-7/16	1-5/16#7.5	1-1/4	1-1/2	1-3/8#8	1-5/16	1-9/16	1-7/16#8.5	1-7/16	1-11/16	1-9/16#9.5	1-1/2	1-3/4	1-5/8#10	1-11/16	1-15/16	1-13/16#10.5	1-13/16	2-1/16	1-15/16#11	1-15/16	2-3/16	2-1/16#11.5	2	2-1/2	2-1/4  #00 Stopper fits and plugs the airlock hole in a drilled stopper so it can be used as a solid stopper#2 Stopper fits standard wine bottle opening#6 Stopper fits wine making and beer brewing industry ½ and 1 gallon jugs#6.5 Stopper fits standard 6 gallon glass carboys#7 Stopper fits standard 3, 5, and 6.5 gallon glass carboys#10 Stopper fits standard 3, 5, and 6 gallon plastic carboys#11 Stopper fits Demi Johns (14.25 Gallon Glass Carboys)#11.5 Stopper fits most oak barrels

Question 2

What are the top and bottom diameters of these stoppers? does anyone know? Thanks

Accepted Answer

1 1/4" top, 1 1/32" bottom

Question 3

is shipment per item or per order ??

Accepted Answer

amazon has this item set for per item

Question 4

For formenting veggies, do you drill out the jar top to use these? And if so what size bit or method do you use?

Accepted Answer

I love these stoppers for bottles like gallon milk or wine jugs, or large juice bottles.  Seems to me you could drill using any drill or cutter whose diameter doesn't exceed the big end of the stopper.  However I fear the thin hole edge might damage the stopper with use.  Instead, for veggies I would use mason jar fermentation lids available here on Amazon.  These stoppers can be used with them if need be, but those lids often come as complete kits.

ASIN	B00AFD9VSE
Brand Name	Craft Brew
Colour	Beige
Customer Reviews	4.6 4.6 out of 5 stars (978)
Global Trade Identification Number	00968277316104
Included Components	Stoppers
Is the item dishwasher safe?	Yes
Item Shape	Cone
Item Weight	0.11 Pounds
Manufacturer	Home Brew Ohio
Manufacturer Part Number	3827
Material Type	Rubber
Model Number	3827
Number of Items	1
UPC	968277316104 885663369004
Unit Count	1.0 count

Drilled Rubber Stopper #6 (Set of 3)

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