Greenhouse Window Automatic Vent Opener, Carbon Steel Solar Heat Autovent Sensitive Greenhouses Window Roof Opener by Aisheny at Sun Light Village. Hurry! Limited time offer. Offer valid only while supplies last. Specifications: Material: Aluminum Alloy Greenhouse Window Opener Kit Maximum opening weight: 7kg/15lb Maximum window opening: 45cm / 18 inch Fully adjustable between 20 - 25 ° C (68 - 77 ° F) Size: 38 x 9.5 x 9.5 cm / 14.96 x 3.74 x 3.74 inch (appr.) Notes: Do not use this opener anywhere the temperature will exceed 50°(122F) Please ensure your greenhouse window can be opened freely by at least 45cm (18'') Do not apply excessive loads by locking or covering window Do not dismantle the
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