Individual Brushes LISTED BELOW! Mack Brush Series 818 - Pure Red Sable Lettering and Showcard brushes. Available in Sizes 2, 4, 6, 8. 10, 12, 14, 16 with hair lengths from 2-1/32" - 1-1/4" Pure Red Sable hair has more spring and is more flexible than Mack Brushes other quills and outliners. Round Red Sable Brush for Lettering with perfect Square Edge. These lettering and showcard brushes are shorter in hair length than Mack's Outliners and Quills, which results in much more control over the brush. After painting it returns easily to its initial shape. Red Sable is not as soft as squirrel and will not hold as much paint.