Specifications:

• feature 1: uses solar energy
• feature 2: Greenhouse Winder Opener Cylinder
• feature 3: Replacement Cylinder
• feature 4: Temperature Ventilation
• feature 5: Refrigerate before use
• feature 6: Roof Automatic Greenhouse Window Opener Vent
• feature 7: Window Opener Cylinder
• Model Number: Roof Vent Opener
• temperature range: 15°- 25°/60°-77F
• Origin: CN(Origin)
• Type: Other
• Cover Material: Other