Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si Knurling : about 0.5mm, 1.0mm, 2.0mm Knurling diameter: 20 mm/0.79 inch 0.5mm diagonal linear knurling : Knurling pitch: 0.5mm Net pulley diameter: about 26mm / 1.02 inch Aperture: about 10 mm/0.39 inch Flower thickness: approx. 8 mm/0.31 inch 1mm diagonal linear knurling : Knurling pitch: 1.0mm Knurling outer diameter: about 26mm / 1.02 inches Aperture: about 10 mm/0.39 inch Knurling thickness: about 8 mm / 0.31 inch 2mm diagonal linear knurling : Knurling pitch: 2.0mm Knurling outer diameter: about 26mm / 1.02 inches Aperture: about 10 mm/0.39 inch Knurling thickness: about 8 mm / 0.31 inch size: 25 x 8mm / 0.31 x 0.98 inch (outer diameter x thickness) Colour:Black Material:Steel Package Contents: 1 * Knurling tool 6 * knurling Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.