Replacement eraser for monogram light and monograph fine. 3 pack How to replace eraser? When the eraser comes out, its time to replace it. Rotate the eraser unit clockwise and leave the eraser pinch with your finger and pull out the eraser to replace?? Insert the replacement eraser and turn the eraser unit counterclockwise to store the eraser.. Size: Height = 85mm Width = 30mm Thickness = 3mm Item Color Trend:White