Since Johannes started the company in 1981, it's has been known as of the best quality for window openers and are curretly exporting the openers to all over the world. However, we have more than 30 years' experience, which make us become the market leader for window openers to hobby greenhouses. We can customize our products to each customer, like special fittings, color and packaging, etc. You are always welcome to contact us for more information.
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