Solexx 5 mm Twin-Wall Greenhouse Rolls 52 has strong, shatterproof greenhouse glazing and is 52 in. wide with rolls up to 1000 ft. long. At 5 mm thick, it protects your plants from strong winds, snow, and other harsh weather and is flexible enough to cover nearly any greenhouse frame. The Solexx Twin-Wall Greenhouse Rolls 49.5 are just like the 52 in. panels but are 49.5 in. wide and come in your choice of 3.5 or 5 mm thickness. With Solexx Panels you can be sure that your plants will not be sunburned and will grow healthier while being insulated from the heat and cold.