This is an excellent quality, 2 holed, rubber stopper. Well, it's not really a stopper, since it has 2 holes in it. I guess it is actually a 2 holed rubber permitter, which limits material from flowing to the rate instilled by the size of the two holes. It seems to work perfectly, and I would not hesitate to order these if you need a two holed permitter. Widget Co. ships fast, and you will be stopping and permitting in no time...