Manufacturered represented are MCL, mini-Circuits, Mitec, Miteq, Narda, NJR, Newtec, Norsat, Prodelin, Quintech, Radyne Comstream and Research Concepts, some items are as small as cable connectors, some items as large as antennas. Everything that we sell is tested and guaranteed, or we will tell you why not. Depending upon the item, our warranty ranges from 30 days to one year, if you have any questions be sure to ask your salesperson.