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this video has how to build one. there are three projects but the introduction cage is one of them:

http://www.youtube.com/watch?v=Wz7DDG2wyaY

I also live in Utah in the salt lake valley. Been keeping bees going on my fifth year and still learning as each year passes. I've had Italians, carniolans, and Russian crosses. With the experiences...

Walter Kelley Sells the Metal ones. I use the metal as I think the plastic will break down after a few years. Click on the link then select Disc Entry in the drop down menu.
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I am getting ready to build my own robbing screens. I have found several designs on the internet some with the bottom completely open along the hive entrance and a small opening at the top, Some open...

I received a package of them las spring and I would have to agree with Humanbeeing. I have MN, Italians and Carnies, and the ones from Honeybee Genetics are more testy then all the others combined....