2-position coax switch has a new center ground protection! Better than 60 dB isolation at 300 MHz and better than 50 dB at 450MHz. 50 Ohm. Unused terminal is automatically grounded for static and RF protection. It has less than 0.2 dB insertion loss and SWR below 1.2:1. Heavy cavity type construction and SO-239 connectors. Mounting holes. 3x2x2 inches.