... , is composed of column, arch, purline, lattice bar, gutter and door 2) Column will be 38 x1.5mm pipe (1 ... 32x1.5mm pipe (1 inch x 60mil)4) Gutter and 110mm PVC pipe are offered to collect rainwater 2.Covering ... for natural ventilation, also can be covered by plastic film and insect net, then use film roll up machine for manual ... manual will be sent to you. LY838TC Saw Tooth Tunnel-Connected Greenhouse