Sigma 3 x 1.4 ft. Automatic Roof Vent sale-summer the Garden Tray combines strength

the Garden Tray combines strength and sustainability

Its unique "channel" design allows components to slide and fit together

Note: It is not necessary to apply sealants between overlapping panels

The BlueLab Dostronic controller is designed specifically for greenhouse hydroponic growing systems and is mounted to a steel stand and wired for 120 volt power

Polypropylene mesh with UV inhibitors

Sigma 3 x 1.4 ft. Automatic Roof Vent sale-summer the Garden Tray combines strengthSupercharge your Sigma Greenhouse with the Sigma Automatic Roof Vent. Improve air circulation by bringing in the fresh outside breeze, keeping your plants healthy and disease free. The automatic roof vent is heat activated, which requires no electrical power or programming. This function ensures that hot air escapes during the day, preventing shriveling or withering of your plants. Sigma Automatic Roof Vent Features: Made from galvanized steel and