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Hello everyone ! As I started looking for a cheapish rubber to replace my old ones I dived into chinese brands. The problem is even if I know that a ceratain rubber is known well I can not find information about it's sponge hardness options or sponge thickness and such. It gets harder the newer the products is. As far as I know most of them don't have their own websites. Is there a website that I can find information about these kind of things ?