These are ANSI standard, 150# class rings. If you need another class (i.e. 300, 600, 900, etc…) just let us know. We can make it!
This is industrial grade FKM with the following parameters:
20° to 350° Service Temperature (°F)
75 Durometer Hardness
1,200 PSI Tensile Strength
This material is a smooth surface with a slight cinnamon smell. It’s an excellent gasket material I use almost every day. And it’s made right here in the United States to exacting standards.