2280 General Purpose Duct Tapes, Silver, 55m x 48mm x 9 mil no checkout The depressed center design allows The depressed center design allows the flange lock nut to recess within the wheel so that it can be used for various grinding and cutting applications Designed for welding gray iron castings to themselves as well as joining them to mild steel Can also be used to repair castings A preheat and interpass temperature on at least 350°F is required during welding PE coated cloth backing is tough and durable Clean crisp tear by hand Natural rubber adhesive bonds to a wide variety of surfaces Moisture resistant Good all temperature performance