Compounds of formula are disclosed. A frequency blocking power combiner circuit combines the first and second outputs to generate a third output in order to drive a load, while providing frequency-selective isolation between the first and second outputs. The advancement mechanism axially advances a hose during multi-threaded engagement so that the hose may be more effectively gripped by the retention mechanism. Each protrusion has a pair of conical sidewalls separated by an angled ramp. The golf ball of this invention is colorful and highly fashionable while retaining an excellent rebound and scuff resistance. The device further includes mounting the modules on a tower.