[amsat-bb] Info needed "European 145 and 435 MHz Diplexer and Dual Band Filter (Model: DCI-145-435-DX-DB)"

Hi all One guy, is selling this filter, http://www.dci.ca/?Section=Products&SubSection=Amateur I am thinking in the possibility of using it for desensing problem with FO-29. I`m pretty sure it would work fine, but the question is, would it pass dc power for feeding the preamp? Somebody knows it? I asked them via email, but not answer. 73 Luis EC4TR