... baso,congo,cameroon,angola etc.. east africa(black material with much copper inside):tanzania,uganda,kenya,ethiopia etc.. north ... africa & middle east(raybestos material with much copper inside):egypt,algeria,sudan,tunisa,morocco,libya,uae ... for clutch facings. (5)Low wear rating,Long life-time. (6)Low noise. (7)Resistance to high temperature. (8)Low vibration. (9)Suitable ...