Type: Multi-Span Agricultural Greenhouses Model Number: film greenhouse; PC sheet greenhouse Place of Origin: China type: multi-span greenhouse Span Width: 8m/9m/9.6m/10.8m/12m cover material: Polycarbonate(PC) OR Film cover layer: single/double/triple layer cover's color: colorless and colorful transparent frame material: hot-dipped galvanized steel material width /length:: customzied ventilation system: roof and side window optional system: shading/cooling/heating/seedbed/irrigation/hydroponics /control system application: seed-dreeding; agriculture etc. Cover Material: PC Sheet or film