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Measuring Bottle Hole For Bung Size
The best way to measure the internal dimension of your bottle neck hole is to use a piece of card as seen in the steps below.
Step 1
Grab the bottle, a piece of card and a pair of scissors.
Step 2
Make a T piece from the card bigger than the hole.
Step 3
Keep trimming down the sides of the T section.
Step 4
After a couple of snips the card will fit into the hole, ensure its a snug fit.
Step 5
Once it fits take it out and lay it on the table and measure the width with a ruler or other device, the measurement will then be the minimum size of the bung, so in this example we would need a 19-21mm Bung
As the hole is 20mm the 19mm fill fit in then the bung will tighten to 21mm which is larger than the measured hole.
Below is a quick video on how to install our bungs.
