BIBISTORE Solar Heat Sensitive Automatic Greenhouse Window Opener Hothouse Vent Openers Auto Vent Kit Garden Tools- (Two Springs,Lifts 15 Lbs,No Power Needed) by BIBISTORE at Sun Light Village. MPN: BIBISTORE-320. Hurry! Limited time offer. Offer valid only while supplies last. Material Upgraded 2-spring Automatic Greenhouse Window Opener Technical Data 1.Fully opens up to 18'' (45 cm) Lift vent weight up to 15 lbs (7 kg) 2.Open temperature adjustable from 15℃ to 23℃ (59℉ to 74℉); Fully open at 35℃ (93℉) or above Note: 1.Do not use your window opener where the temperature will exceed 60℃ ( 140℉ ), 2.Before installation, must ensure your window can be opened without obstacle; 3.Spare cylinders can be ordered separately1.Thicker and stronger
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