Easy Open Tear Tape For Envelopes Red 3mm To 8mm Tear Strip 1. Basic Information This Easy Open Tear Tape (also called tear strip or pull tape) for envelopes uses PET or OPE film as the base material, coated with a pressure-sensitive adhesive in red color. It is designed for sealing and convenient opening of envelopes and courier bags. Users can pull along the red line to open the envelope neatly without tools. The product is compatible with high-speed envelope folding