BRUSHES FOR INTERNALLY ENHANCE TUBES Dual Diameter Nylon Brushes: Dual Diameter Nylon Brush for tubes 15⁄16” I.D. Dual Diameter Nylon Brush for tubes 5⁄8” I.D. Dual Diameter Spin-Grit Brushes: Dual Diameter Spin-Grit Brush for tubes 1⁄2” I.D. Dual Diameter Spin-Grit Brush for tubes 5⁄8” I.D. Dual Diameter Spin-Grit Brush for tubes 3⁄4” I.D. Dual Diameter Spin-Grit Brush for tubes 1” I.D. BRUSHES FOR SMOOTH BORE TUBES Blue Nylon Brushes, 1⁄4”, 5⁄16”, 3⁄8”, 7⁄16”, 1⁄2”, 9⁄16”, 5⁄8”, 11⁄16”, 3⁄4”, 13⁄16”, 7⁄8”, 15⁄16” or 1” Spin-Grit Brushes: Spin-Grit Brush for tubes 1⁄4”- 3⁄8” I.D. Spin-Grit Brush for tubes 7⁄16”- 5⁄8” I.D Spin-Grit Brush for tubes 11⁄16”- 3⁄4” I.D Spin-Grit Brush for tubes 13⁄16”- 1” I.D Brass Brushes: Brass Brushes, 1⁄4”, 5⁄16”, 3⁄8”, 7⁄16”, 1⁄2”, 9⁄16”, 5⁄8”, 11⁄16”, 3⁄4”, 13⁄16”, 7⁄8”, 15⁄16” or 1” Stainless Steel Brushes: Stainless Steel Brushes, 1⁄4”, 5⁄16”, 3⁄8”, 7⁄16”, 1⁄2”, 9⁄16”, 5⁄8”, 11⁄16”, 3⁄4”, 13⁄16”, 7⁄8”, 15⁄16”