The gadget (frame) pictured at you site is called a "No Swarm Cluster Frame" I have a set of these I purchased about 18 - 20 yrs. ago. The idea or priciple of it is to supply clustering space in the brood chambers and help eliminate congestion (one of the main causes of swarming). It provides extra space for clustering bees in the brood chamber without violating the "bee space". There is no propalizing or burr comb building. :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -- Visit www.honeybeeworld.com/BEE-L for rules, FAQ and other info --- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::