The PE8729 from Pasternack Enterprises Inc is a Tunable Filter with Frequency 250 to 500 MHz, Bandwidth 12.5 MHz, Input Power 50 W, Insertion Loss 1 dB, Operating Temperature -55 to 85 Degree C. Tags: Benchtop, Module with Connectors, Mechanically Controlled. More details for PE8729 can be seen below.