Yardwe 2-Pack Greenhouse Window Heat Vent Opener Replacement Cylinder - Auto Vent Opener Lift for Greenhouse & Hothouse Ventilation - Perfect for Temperature Control in Small Greenhouses, Garden Sheds, and Plant Nurseries

Replacement window opener the maximum weight of the ventilation window does not exceed 7 kg

Replacement cylinder for greenhouse made of , sturdy and

Vent opener cylinder hothouse vent openers portable and compact, very space saving

Greenhouse acessory greenhouse winder opener non electric, uses solar energy, open or close the greenhouse vents as temperature rises or drops

Heat sensitve vent opener replacement window opener can be clamped onto or screwed onto your greenhouse frame