Nominal Center Frequency (fn):  450.0kHz 
6dB Bandwidth: fn±4.5kHz min.
Stop Bandwidth: fn±11.0kHz max.
Area of Stop Bandwidth: [within 50dB]
Stop Band Att.(1): 50dB min.
Area of Stop Band Att.(1): [within fn±100kHz]
Insertion Loss:  6.0dB max.
Area of Insertion Loss: [at minimum loss point]
Ripple: 2.0dB max.
Area of Ripple:  [within fn±3kHz]

Part No. CFWKA450KGFA-B0
In Stock: 7

Datasheet: http://www.murata.com/catalog/p05e14.pdf