TC-VUM10A mobile antenna was made by stainless steel.It has the characteristics of corrosion resistance. Model:TC-VUM10A Frequency:144/430Mhz Gain:3/5dBi VSWR:1.5 Maxpower:200W Polarization: Vertical Lighting Protection:Direct Ground Length:31inch Connector: UHF-Male (Pl259). Work for most of dual band mobile transceiver. HYS antennas always use high quality material and it can effectively improve the signal transmission distance of your radio device. What you get: 1PCS HYS TC-VUM10A Mobile Antenna.If you any technical or unsatisfactory problems, plz contact us by clicking RADIO MAX that below the 'Buy Now', and find the button 'ask a question'