Viagrow 5.5ml Panda Poly Film, 50' x 10', Black/White Black on one side and a 90% reflective white on the other side allowing light to be reflected back to your plants where it belongs Panda film is an inexpensive reflective material for grow room walls or green house barriers or floors Reflects light and also prevents mold and algae growth on walls 10 feet wide, 50 feet long and 6 mil thick