TEMWELL wish to advertise RF Helical Band Pass Filter as worldwide using RF components for all kinds of  transmission device design, communication device development, personal research and experiment, Amateur Ham Radio Activities,  and Academic Education purpose. Based on the full RF band coverage and the flexible technology support,  in order to satisfy all RF engineers and design project in the short time, Temwell Filter Store with standard Bandpass filter is here for you as your best source in the world.