Silicone Rubber Gaskets Washer for Swing Flip Bottles, Bottle Seals Gasket Home Brew Beer Top Washers Leak Proof Soda Seal White Cap High Pressure Stoppers Compatible with Brew Beer Sealing Use

I replaced red rubber seals with these silicon-rubber ones. They're thicker and provide a slightly better seal. As others have written, I was disappointed that this purchase requires me to confirm that I'm over 18yo on delivery. They need reclassifying to a category which isn't restricted, and can therefore be delivered through the letter-box.

Perfect for my requirement but missed first delivery attempt. Why was age verification required by Amazon for delivery of this item? Silicone gaskets\washers for glass bottle stoppers?Can someone please explain?

The outside diameter is 25mmThe hole has a diameter of 10mmThey are 6mm thick, slightly cuppedThey could be used with M6-M10 bolts. My photo shows one with an M6 bolt head sitting in it.I had to give my date of birth during delivery as an ID check [because these washers have been categorised as alcohol-related, as you can see from the product description & the seller’s photos].

Good replacement silicone washers for beer bottles. If you are into homebrewing and reuse flip top bottles these provide a good leak free fit.Easy to apply and use.