... 1m-9m;3.Length: 50m/roll, 100/roll; 4.rate of adunbral:30%-90%: growth-protecting material: polythene width: 1m-9m ... Length: 50m/roll, 100/roll rate of adunbral:30%-90% character: adumbral,wet-protecting,aring-resisting,corrosion ... green,ect. Uses: growth-protecting and increase the output of vegetables,flowers,fungi,medicinal material and seedling. Features: durable and strong ...