Got my rubber stopper at towerhobbies.com and put in search term 'rubber
stopper' and you'll get the different sizes. As for #3 you'll need to
know the size in mm. Hope this helps.


Michael wrote:


Anyone know where I can buy a number 3 stopper with one hole in it, like
we all used in chemistry in high school?

What kind of store sells this kind of stuff?

thanks