This isn't just a gasket, its THE gasket. When your grandpa talks about the gaskets used in WW2, this is what he's talking about. It's tough. Tougher than cheap gas station beef jerky. Tougher than an Applebee's $5.99. You want silicone? Go see your local plastic surgeon. Spike doesn't sell that garbage. What you want is EPDM. What is EPDM you ask? Extra Pliable Deer Marrow. It's flexible. It's expendable. It's cheap. This gasket is 1.5" which is absolutely true to size. Don't believe me? Whip the tape measure out--it's a lot bigger than it looks. Other than it's obvious use of sealing metal to metal contact, I've found other uses for this. It's great as a diving ring. Dogs absolutely love chewing it. You can fling it. Slam it. Roll it. Just don't stretch it. Only gripe I have is it's not great for holding a man bun. The low coefficient of friction between hair and EPDM makes it impossible to stay in place. Would I recommend this product? You bet. Where else are you going to find a rubber for $1?
Stop reading this, and go buy one. ****, buy five. If you order 99 of them, Spike ships them for free.