Formula 420 Cleaning Plugs were specifically designed to fit almost any glass piece, with any joint, whether male or female. Formula 420 Cleaning plugs cover the holes on your water pipe to allow you to use Formula 420 or Formula 710 to shake and clean without having to cover the openings with your hands.
Formula 420 and Formula 710 Cleaners can be found here: https://wcsupplystore.com/products/formula-420-cleaners
x1 Set of 3 Formula 420 Cleaning Plugs
Helping Friendly Pipe Helper/Cleaner (16oz)