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Hardness: 1 Moh's.
Talc chalk Silica: 60% ± 1.
Talc chalk Magnesium oxide: = 30%.
Finish: Not polishing.
Certification: ISO9001.
We have size of 125x12x5mm , 127x12.7x4.8mm, 6.4x127mm round, 100x10x10mm, 10x10x80mm.10x5x80mm, 75x10x10mm, 75x10x5mm, 5.5x120mm round.
Characteristics: Fastness when firing, line is clear,dust free.
Application: Used by welders or fabricators for marking on metals when cutting steel plate or welding.
Use: Mechanical manufacturing, Vehicles manufacturing, ship manufacturing, steel...