... virgin material About uswe are a professional Chinese manufacturer of tungsten carbide products such as carbide no standard products, inserts, mining ... carbide bars, carbide rods, carbide balls, carbide burrs, wear parts, tungsten carbide cutting cutters etc. We have rich production experience and ... asK01, K05, K10, K15, K20,K30, P20, P40,etc. cemented carbide for rock drilling tools ( SGS approved )