HARMLESS AND COLLECTIBLE: You will get 20pcs of 10mm harmless and study elements Square including W, Mo, Ti, Zr, Ni, Cu, Fe, , Sn, Y, Co, , Bi, Al, , Mg, C, , Sb, In. HIGH PURITY: The back of elements Squares are curved with purity of is up to 99.9 percent . Al-99.99 percent , -99.995 percent , Ti-99.5 percent , Sn-99.99 percent , Fe-99.99 percent , Bi-99.99 percent , Ni-99.5 percent , C-99.9 percent , Cu-99.95 percent , W-99.95 percent , Mo-99.95 percent , Zr-99.4 percent ,-99.95 percent , Mg-99.99 percent , Pb99.99 percent -, Sb-99.9 percent , -99.95 percent , Y-99.95 percent , Co-99.95 percent , In-99.995 percent . Widely used: tungsten Squares can be used in laboratories, offices, sciences, teachers, gifts, and scientific demonstrations. It is suitable for different ages and has a good understanding of metal, elements, and density. Interests can be collected as art. Lab grade high purity material, almost the best purity you can get in market. The : This product can be collected not only, but also as a gift to family and friends. Suitable for birthday gifts, graduation gifts, Christmas gifts, wedding gifts, etc. Colour:As Shown Material:Metal Size:10mm Package Contents: 20 x Elements Square Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.