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Use the correct tumbler media from Grainger for your finishing project to get the best results. Corn cob media used in your vibratory tumbler gives metalwork a no-stain high polish. Plastic media provides a fine surface finish, as does nut-based media. Porcelain media offers a bright finish when used with your vibratory tumbler. Use stainless steel magnetic pins on undercuts, recesses and slots with your centrifugal magnetic finisher. Come to Grainger for the tumbler media type and shape you need in quantities that will last as long as you need it to.