حلقات O من السيليكون 0.21" CS X 12.975" ID | AS568-379 | داش 379 | متوافقة مع FDA | صلابة 70 | أحمر (8 / عبوة)

I needed something that could handle high heat for a commercial sealing project, and these red silicone rings fit the bill perfectly. The 70 durometer feels just right — firm enough to hold a seal but not too stiff to install.

Finally, a 12.975" ID ring that actually seals without me having to wrestle it on with tools. The 70 durometer gives just the right squish, and these red ones are easy to spot when I'm swapping parts. Replacing the old batch with these was a twenty-minute job, and so far, zero leaks at our standard

These handled the 230°F heat cycling on my custom gasket setup without any visible wear or hardening. The 70 durometer strikes a nice balance—firm enough to hold a seal, soft enough to deform and seat properly.