HFS(R) 6Mil Diamond Film Foil Roll Highly Reflective Aluminum Mylar for Grow Rooms and Greenhouses 4FT x 25FT 4X25FT is up for auction in Patio, Lawn & Garden. The current bid is $2.00, 95% below the $37.99 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.