tsp series thermally stable polycrystalline (tsp) diamond can be manufactured into a variety of sizes and shapes (cubes, cylinders, discs, rectangles, triangles, spheres etc.) that can be inserted into cutting tools, drilling bits, reamers, wire drawing dies, and other wear-resistant components. drill bits and reaming shells made with tsp diamonds are suitable for drilling in soft rocks with hardness below 7 degrees, such as lime rock, marble, shale, etc, and in medium to hard rocks with coarse grains. specification ��1.5x1.5x1.5, ��1.5x1.5x3, ��3x3x3, ��3x3x10, ��4x4x4, ��5x5x4.5, ��5.5x5.5x4.5, ��3x3x2.6, ��5.5x5.5x4.5, ��6x6x4, ��8x8x4, 3x3x10xr1.5, 5x5x10xr2.5 should any of the items interest you, please let us know and send us your detailed requirements. msn/email:celery.diamondsale@hotmail.com