Check the listing for details. Pins STAINLESS steel Pre-cleaned (.047" x .255") ready to burnishBrass/ Casings. Condition: New. Listed at 19.99 USD. Stainless Steel Shot for burnishing cleaning brass and brass casings using a rotary tumbler. These pins are pre-cleaned so you don't have to break them in. Look at our pins before and shiny after cleaning pictures. Avoid that sticky dusty film on uncleaned pins, which leaves a residue on your brass. Never a dull finish with our pre-cleaned pins. These are 304 Stainless Steel pins at the job specific recommended size measuring (0.047" Height by 0.25" Length) or (1.2 mm Height by 6.5 mm Length). Because of the materials precision high quality stainless steel content the durability of these pins is unmatched in the industry. This item contains a package of 15 oz. of Stainless Steel media. Instructions for Brass CleaningPlace the stainless steel pin media in a rotary or vibratory tumbler. Weigh out how much brass or other metal you wish to be cleaned; do not exceed your tumblers weight capacity. Add water to cover the media and brass. Add a few drops of dish-soap or similar. You can expect to run the tumbler about 30 minutes and 2 hours depending on the state of the items. Check after 30 minutes for progress.