MATRIX TAPE marking tape, length 10 m, pack of 10, black. Supplied = assembled. Width = 3 mm. Product type = accessories for whiteboards. Quick division of boards into columns and rows. Self-adhesive and removable. Perfect for drawing straight lines on a board. 3 mm black, self-adhesive tape to divide whiteboards into columns or into a grid, or to simply draw tables and lines on the board. Delivered as 10 rolls of 10 m each.