This ¾ Inch Diameter precision made excellent quality cup brush is made of stainless steel. Each is mounted on a mandrel with a 1/8 Inch (3mm) shank. Each brush measures approximately ¾ Inch (19mm) in diameter. Great for cleaning, polishing and producing special finishes. Use on white metals such as silver and aluminum. Straight or lightly crimped wire produces a more pronounced finish and is used for cleaning, deburring, and surface finishing. Crimped wire achieves a softer or matte finish. Material: Stainless Steel Each is mounted on a mandrel with a 1/8” (3 mm) shank Each brush head measures approximately ¾” (19 mm) in diameter Use on white metals such as silver and aluminum Precision made excellent quality SKU: CMS1000SP UPC: 706569367102 BRAND: SE MPN: CMS1000SP Made In: China Micro-Tools makes every attempt to provide accurate information for each item. Actual packaging and/or specifications may be slightly different from the information and picture provided.J072C-!