Agriculture Tunnel PE Polytunnel Greenhouse Light Deprivation Greenhouses Main Structure : Hot galvanized steel frame, durable for 15-20 years. It is rust-proof, durable, easy to install , and has strong toughness, good adhesion. Blackout system: 100% shading rate balckout curtain, Screen are movable. You can open or close it according to your local weather condition. You can choose the cooling system, irrigation system, circulation system, heating system, seeding bed, according to your requiremen Model SG008 SG009 Pipe Dia Covering Film Width 8m 9m 25/32/40/50/60mm for choice 80-200 micro Length(m)…