What is perforated window vinyl?

A 6mil white flexible vinyl front with a clear removable acrylic adhesive back. This perforated window film is designed for production of see through graphics for windows. Open area is approximately 30% with a hole size of.060 inches (1.5 mm). Recommended for use on flat vehicle windows or retail store windows. In use this product is applied to the exterior glass surface, which must be clean to assure adequate product bond. Do not use solvent or ammonia-based glass cleaners for cleaning. The user of this product is responsible for complying with any applicable vehicle code regulations.