The product is an unbranded SO-239 female QC connector designed for use with the Bird 43 wattmeter. It is a universal type COAX connector manufactured in China. This connector is compatible with various radio communication equipment and is commonly used in the tubes and parts & accessories category of consumer electronics. It allows for easy and secure connection to the wattmeter for accurate power measurements in radio communication setups.  I do combine shipping and refund any unused postage.