They are made by a Canadian company ,Swienty are selling them .
I have 2 boxes for them with the supers for them to fit into langstroth hive. I have failed to get the bees to draw them , mind you having spoken to other beekeepers in my general area, they tell me it is nearly impossible to get bees to draw sections here , they swarm first. As far as I am concerned the bees use them for parking space.
It may be my own fault , the older guys tell me you have to force the bees into the supers to draw any sections hard to get it right .
When I looked up Bee o pac , the website says the bees will draw those sections directly , other sites are saying to put a bit a wax on the plastic with a paint brush & they work them faster. I am still waiting for either to happen. As well as that I found the plastics frame that clip together seem to pull apart in the hive & the bees go inbetween where they shouldn't