The LFHK-2250+ from Mini Circuits is a Low Pass RF Filter with Frequency DC to 2250 MHz, Stopband Frequency 3100 to 43000 MHz, 3 dB Cutoff Frequency 2530 MHz, Insertion Loss 1.5 to 2.3 dB, Rejection 20 to 72 dB. Tags: Surface Mount, Ceramic Filter. More details for LFHK-2250+ can be seen below.