Regulates air flow with two adjustable vents that allow you to adjust temperature and humidity, guaranteeing better results for the garden. Heavy-duty 7" vertical design fits tightly onto standard 10" x 20" flats, reducing moisture loss, while giving more cubic volume for plants. 

Measures:
7½" H x 11" W x 21¼" L

• Two adjustable vents allow you to adjust temperature and humidity
• Heavy-duty design fits tightly onto standard 10 x 20 inch flats
• Gives more cubic volume for plants