LPF2500M is a Low Pass Filter (LTCC Construction) Pass Band DC-2500 MHz. SKU#: AK28_001AA.
Enclosure uses RF Design Kit with dimension 0.9375"x0.75x0.59". S-Parameter of part measured on VNA (0 Hz to 8 GHz) is shown in third picture.
Proudly Made in USA by Lotus Communication Systems, INC. in Massachusetts (www.lotussys.com).