Reflective Mylar film (reflective foil/ Mylar grow sheet) A) Both sides are durable, mirror-like metalized (metallic) finish polyester film to go with all Grow Lights, reflecting 97%+ light back to growing area.B) To be used as wall covering to reflect the light back onto the plants. This film can be tacked or taped directly to a flat surface. C) Even better quality and optimum reflectivity than our overseas competitors! Standard size:50’’ (127cm) in width, 1 mil. (25 microns) or 2 mil. (50 microns) in thickness, rolls in 25'(762 cm)/ 50'(1524 cm)/ 100'(3048 cm)/ 150'(4572cm)/ 200' (6096cm). Other sizes and lengths are available upon request.A) Important update!!! Width in 48'' or 54'' or other special widths is still available if you can order more than 1 x 20' container at a time for just reflective Mylar product line.B) The 2 mil. thick works well for most applications and superb durable while 1 mil. thick is easier to cover a surface. Standard Packing:A) Film is rolled onto paper cone and packed with CYLINDER white box, cardboard sealing caps at both ends of the box, then 12 or 9 or 6 pieces CYLINDER boxes in one white outer carton. (Save you shipping space and very easy to store)B) A sticker on each CYLINDER box shows the size in it. Of course, your special packing requirements can be followed like no sticker required, or you want stick your own LOGO on it at your side or at our factory.