The RNFL2580K from RF-Lambda is a Band Stop Filter with Stopband Frequency 2.580 to 2.620 GHz, Insertion Loss 2.5 dB, Rejection 60 dB, Power 50 W, VSWR 1.80:1. Tags: Module with Connectors, Notch Filter, Cavity Filter. More details for RNFL2580K can be seen below.