The most bottom box - 6F Dadants - the colonies came thru winter in those.
The boxes above are 6F deep Lang boxes.
The apiary is located at the location similar to the USDA zone 5 (but close to 6).
Some serious $hit - all bunch of cheap boxes made from particle board and scraps.
(1175) Шестирамочные ульи к концу медосбора - YouTube