The KFL177428 from Konnect RF is a Band Stop Filter with Stopband Frequency 1710 to 1785 MHz (Band -1), 1805 to 1880 MHz (Band -2), Insertion Loss 1 dB, Rejection 60 dB, Power 1 W (Average Power), VSWR 1.50:1. Tags: Module with Connectors, Notch Filter. More details for KFL177428 can be seen below.