Cms specificaiton: 1. Cylindrical diameter: 1.0mm, 1.3mm, 1.5mm, 2.0mm. (also can produce according to requirement if volume is ok) 2. Appearance: black column 3. Diameter height ratio: 1:1.5~3 5. Crushing strength: > 100n/p min 6. Dust level: 99% 8. Packing: 20kg/40kg plastic drums 9. Bulk density: 660-700g/l 25kg plastic drum