Permium Material: Soapstone refills are made of natural white soapstone. They are uniform in texture and size. Will not contaminate welds and easy to wipe off when desired. Function: Perfect for any , tiles, metal, asphalt and many more surfaces,also works on chalkboard. Natural: with 30 soapstone pens are excellent for your marking needs. Our soapstone will not contaminate your weld or damage metal surfaces. Widely Used: Make perfect markings for Welding, Metal Fabrication, Construction, and Textile. Mark Precise: Soapstone marking pencil mark white clear and removable Markings, Best for marking welding and cutting. Colour: white Material: natural ore Size: 90x12x5mm Package Contents: 30 * Soapstone Pens Only the above package content, other products are not included. Note: Light 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.