Stop Sign Handle with Care Carton Sealing Printed Packing Tape, 2.0 Mil, 3" x 110 Yards, White & Red 6 Roll Description: Stop If Seal Is Broken. Total Thickness: 2.0 MIL; Color: White with Red Letters. Acrylic Adhesive Tapes with Warning Signs. Standard 3 core diameter - common size for most tape dispensers. Notifies workers, shippers and customers to handle packages with care.