27 Pack (10 Assorted Sizes) 000# - 7# Tapered Lab Bungs Solid Rubber Stoppers

Worked well, lots of sizes. Very heavy duty, stopped the leak for what we needed. It was nice to have multiple size options.

Great product! I needed for my portable air conditioner and it did the job! My air condition is no leaking anymore!

I bought this assortment of rubber stoppers after trying to buy a couple different replacements for my air conditioner plug. The first two ones I bought did not fit properly, but this assortment pack gave me many options to choose from and I found one that worked great for the AC unit. It fit snug and doesn’t leak. I’ve since found several uses for some of the other ones in the pack. This was a great deal to give me multiple sizes, of heavy duty plugs & at $8 it didn’t hurt the bank. Turns out to have a lot more uses than I ever thought they would.

Great product, shipped quick!

Great variety of sizes

I'm working on a motorcycle gas tank where the coating inside failed, leaving rusty patches and bits of flaking coating. I decided to fill the tank with a strong, alkaline cleaner (Purple Power) to help soften the coating and also to use as an electrolyte for electrolytic rust removal. Yes, a new gas tank (or a new bike) would be easier. Yes, I'm a glutton for punishment. Yes, I do this to myself every single time. In order to fill the tank I had to plug the hole for the petcock. I measured the size and made sure this set had one that would work. I tapped it into place with a rubber mallet and so far it has made a very secure, leak-free seal. The rubber is relatively firm so an opening that is irregular may not get sealed effectively. The hole for the sending unit in my tank is like this. There is a plug that fits and is nice and tight when tapped into place, but it is not leak free. This isn't the fault of the plug. I'm asking it to seal around an irregular opening in thin sheetmetal, and it just isn't designed for that. However it is something that you should know about if you're buying this kit because not all the stoppers will work to plug all openings. In my case, I'll use the sending unit or a block-off plate and o-ring to temporarily plug the hole. For the price, this is a useful kit to have in my toolbox. After this, I'll probably use some of the stoppers to plug screw holes when I paint parts. They've already paid for themselves with this gas tank.

I got enough stoppers in this pack to satisfy all my needs, even if I did not think of a particular one at the time of purchase. They are solid and stay in place. I keep the extras on hand in case I, or a family member or friend should later need any. I would purchase again if I needed to.

They’re rubber and plug holes. Not much else to say other than nice selection of sizes