Shexton Automatic Window Opener Kit Greenhouse Window Opener Vent Autovent Solar Heat Sensitive Automatic Greenhouses Roof

【Feature】:Prevent greenhouse overheating. 【Excellent performance】:Can be clamped onto or screwed onto your greenhouse frame. 【Scope of application】:Ideal for your greenhouse window--opens and closes your greenhouse window. 【Advantage】:As the temperature changes automatically, maintains the best growing temperature and prevents your greenhouse from overheating.