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| - Besides, fillers such as calcium carbonate, carbon black, clay and additives like sulfur, stearic acid, zinc oxide, wax, oil, accelerators are mixed into rubber as ingredients.Anyway, from a trash perscpective, I am putting them with plastic, because even if natural rubber, they do not degrade right away, have a lot of stuff in them at a minimum to make those purty colors, and could end up damaging
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