***DISCONTINUED PER MANUFACTURER***3M™ PTFE Film Tape 5490, Brown, 1 1/2 in x 36 yd, 3.7 mil, 6 rolls per case. 3M™ PTFE Film Tape 5490 uses an extruded polytetrafluoroethylene (PTFE) film backing. This tape offers an extremely low coefficient of friction which, in combination with a pressure sensitive silicone adhesive, creates a smooth, non-stick surface over a variety of substrates to assist in the movement of materials in many types of lay-flat applications.