Double Spring Automatic Window Opener for Greenhouse Sturdy Ventilation System Silver Easy to Install Efficient Air Circulation

Package List 1 x Automatic Vent Opener Characteristics -Material: Galvanized sheet, aluminum automatic greenhouse window opener -Color: Silver greenhouse window opener -Size: About 34.00X12.00X5.00cm/13.36X4.72X1.97inch greenhouse vent automatic opener -It can maintain the best growing temperature and prevents your greenhouse from overheating automatic vent opener greenhouse windows. -Can be clamped onto or screwed onto your greenhouse frame greenhouse-window-openers. -It is premium and compact, very space saving auto vent opener. -Made of , very sturdy and durable greenhouse automatic vent opener. -It can open or close vents as temperature rises or drops auto vent opener automatic.Goods Descriptionautomatic vent opener greenhouse windows It can be installed easily onto your greenhouse frame, very simple and convenient.auto vent opener Great for variety of occasions, garden, flower room, farm, botanical garden, railway and greenhouse.auto window opener The window opener is made of materials, which is strong and sturdy

• Greenhouse window openers--the maximum height of the open window is about 45 cm,greenhouse vent opener
• Greenhouse-window-openers--the paint spraying aluminum frame looks more , durable and rust-proof,automatic vent opener
• Greenhouse ventilation equipment--great for variety of occasions, garden, flower room, farm, botanical garden, railway and greenhouse,greenhouse vent automatic opener
• Automatic window opener--when the temperature changes, the vent opener can automatically stretch or contract the vent,greenhouse automatic vent opener
• Greenhouse window opener--auto-opening temperature range is adjustable from 15-25℃ by turning the cylinder,greenhouse window vent opener