The DEI5856-455KHz from Dynamic Engineers is a Band Pass Filter with Frequency 454.05 to 455.95 kHz, Bandwidth ±950 Hz, Insertion Loss 6 dB, Ripple 2 dB, Operating_Temperature -10 to 30 Degree C. Tags: Drop-In, Crystal Filter. More details for DEI5856-455KHz can be seen below.