This tape can work on a variety of surfaces, including plastic, whiteboard, paper, wood, etc. Make sure that the surface is clean and dry before use. It is easy to tear and leave on the surface. Perfect for you to make straight lines on dry erase board, and will not leave or bubbles. The width of these black tapes is 3mm. Suitable for positioning, decorating the wall or making your paper works. Features - Color: Black. - Material: Polyester. - Size: 50.00X11.00X0.30cm/19.65X4.32X0.12in - Grid marking tape dimension: these chart tapes will come in rolls, and the width of the tape is 3 mm/ 0.12 inch, 50 / 164 feet long for each roll, enough for your use. - Graphic chart tape: these chart tapes are in black color, very obvious and general when applied on whiteboard; You to proper length you like, easy to use. - Wide uses: these art tapes fit for grid creating, you can use these tapes to distinguish things and mark your paper works, line charts, guide lines, blackboard-writings, etc. - Useful gridding tapes: ultra thin gridding tapes can also work as craft tapes, such as creating lines on your scrapbooks, journals, paper crafts, fashion designs and so on. - Quantity: 10 rolls of black gridding tapes, each roll’s length is 50 / 164 feet, can meet your everyday needs for marking and lining. Package list: 1 x set of 10 Pieces 3mm Width Whiteboard Gridding Tape Grid Marking Tapes Self Adhesive Chart Tapes Artist Tape (Black)