Scotch Magic Tape. Keep the productivity on a roll with Scotch Tapes. Mend it, seal it and secure it with this permanent transparent tape. Non-yellowing tape disappears when applied, and stays invisible over time. Can be written on. No. 810: 1 inch core comes in 36 yd. rolls in 1/2 inch and 3/4 inch widths; 3 inch core comes in 72 yd. rolls in 1/2 inch, 3/4 inch and 1inch widths. No. 104: 1/2 inch x 450 inch; No. 105: 3/4 inch x 300 inch - in refillable dispensers.