Agfabric Hoop House Kit, Mini Greenhouse, Grow Tunnel within Support Hoops,Plant Cover &Frost Blanket For Season Extension Support (30FT long) Kit: 1pc of 0.9oz 7x50ft row cover, 18pcs of 8ft long 1/4" dia hoops and 36pcs of connectors. .Each hoop is jointed by 2pcs of 4ft long hoops and 1pc of ferrule arch span: 31"~63", approximate arch height: 23"~31",as the important basis of installation Row Cover for safe and effective barrier excludes many types of pests,including insects,birds and animals,also protect plants from overheat and frost Heavy-duty Double Hoops can more effective Resistance to heavy snow and frost than single hoop Design for plant covers, frost protection cover and mini greenhouseprovides ideal environment for rapid germination and growth of young plants