Porcelain medias are made of alumina, extremely hard, which is mainly used for fine finishng,mirror polishing, lursting and burnishing of metal parts, specially for ainc, aluminium alloy, plastic amterial parts, can be available in white, yellow or green color. Available shapes including Ball, Triangle, angle-cut triangle, Cylinder, angle-cut triangle, Ellipse, angle-cut, ellipse. Density: 2.9g/cm3, 3.2g/cm Ball Triangle Angle-cut triangle 1.0 4.0 10.0 20.0 2x2 6x6 15x15 2x2 6x6 15x15 1.5 5.0 12.0 25.0 3x3 8x8 17x17 3x3 8x8 17x17 2.0 6.0 15.0 4x4 10x10 4x4 10x10 3.0 8.0 18.0 5x5 12x12 5x5 12x12 Cylinder Angle-cut Cylinder Triangle cut cylinder 1.5x1.5 5x8 12x12 1.5x3.0 5.0x10 12x12 6x16 19x19 50x50 2.0x2.0 6x10 15x15 2.0x4.0 6.0x10 15x15 12x12 25x25 3.0x3.0 8x16 3.0x6.0 8.0x16 4.0x8.0 4.5x14 4.0x8.0 10x120 Ellipse 3-stars Grain 8x3x8 10x10x10 25x25x25 0.4-0.7 1.2-1.7 2.0-2.8 3.4-5.0 10x6x10 20x20x20 30x30x30 0.6-1.0 1.4-2.0 2.3-3.4 4.0-6.0 12x6x15 0.8-1.3 1.7-2.4 3.0-4.3 4.7-6.7 12x7x15 15x6x15 15x7x15