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

Part Number	Center Frequency (MHz)	Pass-band (MHz)	Insertion Loss (dB) Max.	Return Loss (dB) Min.	Ripple	Rejection (dB) Min.	Connector	PDF
KTWF37-1-SMAF	3700	200	1	12	1	25dB@f0±150MHz	WR229
KTWF-625-4-SMAF	6250	40	1.5	12	1.5	35dB@f0±90MHz	SMA-F
KTWF-10-4-SMAF	10000	50	1	12	1	60dB@f0±500MHz	SMA-F
KTWF-119-6-SMAF	11900	440	1	14	1	80dB@f0±1500MHz	SMA-F/WR75

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.