This Avanti low pass TVI filter’s 3 dB cutoff is at 43 Mhz with 80 dB of attenuation at 54 Mhz to help keep your HF transmitter harmonics out of local television receivers. Comes with 2 UHF SO-239 female connectors to go between your HF transceiver and antenna. To see my other listings please follow this link: https://hamshack.ca/author/ve6tc/