Phelps Dodge 696-4 (440-470 MHz) 4 cavity pass-reject. Will tune to your frequency pair. 

Minimum freq. spacing      4.0 MHz

Insertion loss             0.8 dB

Max. continuous power      250 watts

Tx noise supp. at Rx freq. 85 dB

Rx isolation at Tx freq.   85 dB

Temperature range          -30 to +60C

VSWR                       1.3:1

Weight 17 pounds