Solar Heat-Sensitive Automatic Window Opener for Greenhouse - Double Spring Tool

Important Notice: 1.<br> Greenhouse Double Spring Automatic Window Opener Solar Heat Sensitive Garden Vent Agricultural Toolf-f f54<br> Automatic ventilation of greenhouse can not be used at temperatures above 50 (122 F)<br> 2.<br> Make that your greenhouse window opens normally<br> Specifications: Maximum height of the window opening about 45cm<br> The temperature of complete opening about 30 (depending on adjustment and load)<br> Maximum weight not more than 7kg/15lb, Opening temperature regulated 16 to 25<br> When you receive this item in summer, you need to put the black bar into the refrigerator not less than 5 minutes to make the cylinder retracted fully before you assembly This item.<br> 1 x Automatic Window Opener kit<br> Colour: Black & Silver<br> Material: aluminium alloy<br> Included in the package:<br> Only the listed package contents are included.<br> Note<br> Note: Actual colour may vary slightly because of lighting and display settings.<br> Please allow a measurement tolerance of +/- 1-3cm.