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Second unit for an additional cold frame, since the first one performed as expected, might as well stick to something I know works, Thank you.

works perfect for coldframes. Good quality material,easy to setup.

This lever is of great quality. If it is designed for your vent then buy it. Sadly, I had to return mine. I was looking for a strong spring action lever for my Yardestry greenhouse. One I could also easily detach when not using. Yardestry has a unique lever system that is not offered in a stronger and similar design that I wished this would offer.

My only concern is that sales and service have a list of greenhouse types where this works and does not. When researching and speaking, they were not sure. This cost me in freight and time.

They have a good team that has good intentions; yet, they could be even better if they know what they don’t work with. That is also my problem.

This lifter works great for us. We use it to open the cover and vent our cold frame. Extremely well built. Looking forward to years of seasonal use! Also appreciate the great service of this business. They carry quality products and provide timely service.

I love having this auto-vent on my cold frame so my cold-weather veggies don't cook on sunny winter days. :) Thanks!