These lids are enameled / painted so they will not rust unless there is a chip and the metal shows through. We have been using them and haven't had any rust.
If you do not also purchase a soap pump, you are getting a regular mouth Mason jar lid with a 27mm (about 1 1/8") hole in the middle.
You may also like
The lid is a perfect fit! I purchased a mason tissue jar and the opening in the lid just kept ripping/shredding the tissue when you pulled them out. I feel very lucky to have found this site. I attached the lid and the tissues do not rip when pulled through the hole! I am so happy.
Thank you for making a great product. I have your site saved for future purchases.