the bottom 1 is a far bank and it has Slim balsa bodies
0.6 carbon stems 1mm cane antennas made famous by Pete Rice who wins matches repeatedley at Tunnel Barn Farm Fishery. They are now used successfully at other commercial fisheries also.
One angler Rob Lawrence has been banned from one complex for winning too many matches using these floats.
Usuage

own the edge, 1 & 2 mtr on the drop, baits,pellet,maggot, caster and meat.
The fourth float (4x12) has a thicker antenna for fishing the far bank.