3M Reinforced Electrical Tape 1139, is an industrial grade 6.5 mil electrical tape constructed with a polyester film, glass filament reinforced backing mated to a pressure sensitive acrylic adhesive. This product is used for heavy duty air and oil filled transfer applications and is suitable for fulfilling reinforcing, holding, separating, insulating, bundling and covering needs. Constructed for effectiveness in demanding industrial applications, this product exhibits solvent resistance without thermosetting and a high breaking strength.