RowTunnel,10ft long High Rise Tunnel Hoops for Row Cover and Grow Tunnel support,Plant Cover &Frost Blanket For Season Extension Support,20-Pack Never rust high rise tunnel hoops Ideal hoops for row cover, plant covers and frost protection cover support Design for plant cover, frost protection cover and mini greenhouse 5/16"*10', pack of 20, 1pc of 10ft long hoop is jointed by 2pcs of 5ft hoops with 1pc of ferrule arch span: 62"~84", approximate arch height: 24"~30",as the important basis of installation