Automatic Opening Closing Louver Blind Window Opener Opening Tool for Home Office Greenhouses , Roof Ventilation Window Opener , Roof Ventilation Window Opener , Automatic Opening Cwindow opener tool

Specification : Condition : 100 % Brand NewItem Type : Window OpenerMaterial : AluminiumOpening Force : 25kg / 55lbOperation Area : Start at 17 25℃ (63 78℉)Maximum Open : Full at 30 32℃ (86 90℉)Closing Force : 15kg / 33lb via heavy duty springSupport Bar Length : Approx . 34cm / 13 . 4inSpring Fixing Tool Size : Approx . 14 x 5 cm / 5 . 5 x 2 inWeight : Approx . 343g / 12 . 1oz Package List : 1 x Support Bar1 x Spring Fixing Tool4 x Slotted Screw2 x Small Cross Nail4 x TD Screws2 x Small Screw4 x Large Round Fixed Ring2 x Small Round Fixed Ring2 x Round Iron Ring1 x Instruction Manual

• [Automatic] : This opener will automatically open and close your greenhouse window , as the temperature changes automatically , maintains the best growing temperature and prevents your greenhouse from overheating . Automatic shutter shutter shutter opener
• [Applicable Scene] : The maximum opening of the window is 45cm , simple installation , no complicated operations , can be clamped onto or screwed onto your greenhouse frame .
• [Overheating Protection] : This automatic window opener will help you maintaining the best growing temperature and avoid your greenhouse from overheating .
• [Easy To Install] : Vent opener greenhouse equipped with screws , screw it into the panel , wood or metal frame directly with a screwdriver , simple and convenient .
• [Notice] : Do not apply excessive loads by locking or covering window . The automatic ventilation window opener in the greenhouse cannot be used in an environment with a temperature higher than 50¡ã