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❤【High Quality Material 】Made of Aluminum+SS, has stronge thrust force, solid, durable, reliable and stable. Universal fit for all aluminum frame greenhouse.
❤【Auto Adjustment】Solar heat sensitive vent opener, automatic stretch or shrink the vent while the temperature is changing. Auto-opening temperature range is adjustable from 15-25℃(60-77℉) by turning the cylinder. (Clockwise for higher, counter-clockwise for lower)
❤【High Weighting and Big Opening】Vents weighting up to 7kg/15lb. Maximum opening at about 30℃/86℉(depending on adjustment and load).$38.97Brand : Brand: Decdeal -
❤【More Reliable and Stable】Compared with the single spring vent opener, the double vent opener has stronger thrust force, more solid, and much durable. Universal fit for all aluminum frame greenhouse. The double spring window opener can be closed manually.
❤【Auto Adjustment】Solar heat sensitive vent opener, automatic stretch or shrink the vent while the temperature is changing. Auto-opening temperature range is adjustable from 15-25℃(60-77℉) by turning the cylinder. (Clockwise for higher, counter-clockwise for lower)
❤【High Weighting and Big Opening】Vents weighting up to 7kg/15lb. Maximum opening at about 30℃/86℉(depending on adjustment and load).$44.98Brand : Brand: Decdeal
