RowTunnel,1/5"Dia, 6ft Long Hoops For Grow Tunnel, Greenhouse, Support For Plant Cover And Seedling Guard White Color, Plant Cover &Frost Blanket For Season Extension Support,20pack Never rust tunnel hoops, hoop house support for frost protection in winter Design for plant covers,row cover, frost protection cover and mini greenhouse 1/5-Inch by 6-Feet,20-Pack,white color Use hoops to support garden row covers, protecting plants from frost, insects, birds, or intense sun arch span: 28"~37", approximate arch height: 21"~23",as the important basis of installation