Sigma 39 (Gen III) Alpine Thickness is 16mm

Thickness is 16mm

Is not compatible with Sungrow Compact greenhouse

The shelf is installed inside the greenhouse at any convenient height

It will provide increased ventilation and enhance air circulation

Sigma 39 (Gen III) Alpine Thickness is 16mmTake backyard growing further with the Sigma 39 (Gen III). Built with heavy duty materials, this greenhouse supports 3 to 4 seasons of cultivation, giving you the opportunity for multiple harvests throughout the year. Its advanced engineering and durable construction bring the performance of a commercial greenhouse into a refined backyard structure. Exact size: 118. 1 x 83. 9 x 472. 4 inches The end to end airflow, spacious size, and high 7' ( 2. 13