Mylar (PVC) film is a reflective covering used in greenhouses and grow rooms to direct unused light back to the growing space. This is a very cost effective way to boost the efficiency of costly grow light systems. The 1.4 -2 mil gauge Film is the most durable available and can easily be mounted with tape. Available in a variety of sizes and colors 48 - 54 inch wide by 25 - 50 - 100 ft. length rolls. Use as a reflective wall covering for greenhouses and grow rooms Directs unused light back to the growing space A Cost Effective to boost the efficiency of costly grow light systems Flame Resistant Tear Resistant Durable 1.4 - 2 mil gauge Film Easy to use and mount