Sungrower Duramax 200 - 34' x 75'DURAMAX 200 Duramax 200 is a 12 mil woven poly greenhouse cover that permits 85% light transmission in greenhouse environments. Duramax 200 greenhouse covers are graded to last 6 years under normal climate and growing conditions. Ideal for hoop houses and greenhouses in hotter climates, Duramax 200 is a cost effective and manageable solution for greenhouse growing that will last for years to come. Why use Duramax 200? Duramax 200 is a relatively thick