Before you purchase custom o rings, nitrile o rings, Teflon o rings, quad rings or neoprene o rings, you will want to ensure that you are purchasing great quality. That is why assessing their properties is important. You ought to know what the Teflon o rings are made of. They come with a temperature range of -1,000F to +4,0000F. This ring is water-resistant and has low friction properties of PTFE that make it an ideal material when building o rings. With such properties, you can be sure that this ring will serve its purpose for a long time. You will get value for your money in return. To be honest, that is what every customer wants when buying any product.