The 2958-SMA from KR Electronics (A Division of NIC) is a Band Pass Filter with Frequency 1.32 to 1.94 GHz, Bandwidth 623 MHz, Center Frequency 1630 MHz, Insertion Loss 3 dB, Rejection 40 dB. Tags: Module with Connectors, Lumped Component Filter. More details for 2958-SMA can be seen below.