Here just list out a part of catalogs as follows for reference. Customized products are available, please consult with Kete.

Part Number	Pass-band (MHz)	Insertion Loss (dB) Max.	Return Loss (dB) Min.	Rejection (dB) Min.	Description	Connector	PDF
KTLF-C806-1-SMAF	5 - 806	1.5	10	60dB@890-960MHz	Cavity	SMA-F
KTLF-C894-2-SMAF	DC - 894	1	15	70dB@1760-2668MHz	Cavity	SMA-F
KTLF-M2731-2-NF	2700 - 3100	1.5	14	15dB@5400-6200MHz	Microstrip	SMA-F
KTLF-M30-2-SMAF	40 - 3000	1.5	/	40dB@3300-5000MHz	Microstrip	SMA-F
KTLF-M155-2-SMAF	DC-15500	1	15	45dB@19.6-22GHz	Microstrip	SMA-F

Filter is a kind of the device that allowing a certain part of the frequency of the signal through smoothly, and inhibit the other part of the frequency of the signal. Can pass the frequency range of the signal in the filter, known as the passband. On the other hand, the signal attenuation or completely suppressed was very frequency range is called the band rejection. It is small with firm structure and high stability etc.