The two symmetrical arrangements in the middle may be a pair of \$\frac{\lambda}{16}\$ Chebyshev impedance transformers. At 105 MHz these would be about 7 inches in length, if I'm guessing right. The input side would then be a unbalance-balance input balun and the output side would then be a "balance-unbalance" balun. Do a search for push-pull amplifier balun designs to find something like this. The coax in ferrite? Not sure. But why don't you write to the seller and just ask?
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