4X20Ft Grow Tunnel,Mini Greenhouse, Hoophouse Kit, 0.9oz , 725 ft Floating Row Cover+1/4"Dia Hoops arch span: 31"~63", approximate arch height: 23"~31",as the important basis of installation Use hoops to support garden row covers, protecting plants from frost, insects, birds, or intense sun Design for plant cover, frost protection cover and mini greenhouseprovides ideal environment for rapid germination and growth of young plants 1pc of 0.9oz 7*25ft row cover, 9pcs of 8ft long hoops included,each hoop is jointed by 2pcs of 4ft long hoops and 1pc of ferrule Row Cover for safe and effective barrier excludes many types of pests,including insects,birds and animals,aslo protect plants from overheat and frost.