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637 Posts
I had one of those each in two nucs I bought. It was the " fifth building frame" for the bees. I put it into my 10frame when I got home. the bees totally ignored this black frame/foundation and went straight to buiding natural comb on the foundationless frames I also installed. Besides ignoring it........I did not care for all the lil hidey holes for SHB that this style frame provided. Gave em too many spots to crawl into and the bees cant get to them to run em out. After 3 weeks I took it out and threw it away. This was my personal expeierence. Others I'm sure feel diffrently. No prob...each to their own so they say!