# 7 Fits many glass carboys
$1.59
# 7 fits many glass carboys, but can pop out if wet. It is especially good for the Mexican 5 gallon carboys, which have just been discontinued, but are abundant due to past sales. We are your one-stop shop for all your rubber stopper needs. We have a large, in-stock inventory of gum rubber stoppers available in a variety of sizes, made from off-white pure gum rubber. These stoppers have a molded or drilled 3/8" hole, which can accomodate an airlock. Manufactured in the USA!