Covers tomato cages up to 17-in. across with red film that increases yields by up to 20%! Perforated to allow air to circulate and helps to retain heat. Protects against hard rain and pests. Consists of one 20-ft. tube, 28-in. across, that can be cut to size. Expect 5 to 7 greenhouses from each tube. Includes a cutter and twist ties.