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First of all, tensile strength is irrelevant since the material is not being not being pulled or elongated, but compressed.
While Delrin has about 5 times greater tensile strength than rubber, tensile strength testing of rubber is rarely done.
Rubber has better compressibility and elasticity than Delrin and is the more desireable quality to have.
In addition, Delrin has an inherent lack of adhesiveness, that is, it is slippery. That is the last quality you want to have in a pad supporting your car.
I wouldn't tell people what to do. What I am saying is that I would never get under a car which was supported with slippery pads, nor would I even raise my car with them, nor would I recommend them to anyone.
And, I agree with JFP, you are trying to hock your wares while circumventing the proper procedure for merchants. For you to slither in here and try to lambaste a well respected fellow member with your all of 5 posts is bad form indeed!
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