tesa 4163 tesaflex is a specialty soft PVC electrical tape, 33 m long by 50 mm wide in black, coated with a UV- and weather-stable acrylic adhesive. The pliable film conforms tightly to irregular shapes and the adhesive resists ageing on outdoor and long-term joints. It is suited to insulation, bundling, and marking of cables and terminals. Supplied in packs of three; typical application is professional insulation and phase-marking work in electrical installations.