TRIXES 50 Meter Self Adhesive Whiteboard Grid Gridding Marking Tape Black GRIDDING TAPE FOR WHITEBOARDS; Self-adhesive vinyl gridding tape, ideal for marking a grid on a whiteboard EASY TO USE; Simply start at where you would want the grid to start and then carefully follow in a straight line to get the perfect grid. If you make a mistake, just gently lift the tape and re-stick and re-apply to get the perfect finish EASY TO REMOVE; These whiteboard tapes have strong adhesive and will stick to the whiteboard surface as long as you want. If you no longer want the grid, just peel and remove. It will not leave any residue behind 40 METERS LONG X 3MM WIDE; At 40 Meters long for each roll, you won't run out for a while and the 3mm width is perfect for making neat grids PERFECT FOR TEACHERS, MEETINGS AND TARGETS; Ideal for creating any form of grid, table or guide lines on dry wipe and magnetic boards