#7 Rubber Cap
$5.95
Mon - Fri: 8 AM - 5:30 PM CST
Sat: 9 AM - 1 PM CST
(RC105) 1-11/16 inch inside diameter. These stretch over the outside of the neck of your jug. They have a hole in the top to fit all of our air locks, except for the "Giant Hobby #2 Air Lock". These are preferred by some people over the rubber stoppers, and in some situations they work better.
Mon - Fri: 8 AM - 5:30 PM CST
Sat: 9 AM - 1 PM CST