Midland's The Highland Tall��� antenna is sure to bring reliable and clear communication to areas with minimal obstructions like wide-open paths and highways. This antenna is 47.5 inches tall, mounts on a �� inch hole, and is built with durable fiberglass strong enough to tackle the toughest trails. With an easy installation, you'll be increasing radio range in no time. The MXAT04 is interchangeable with the heavy-duty spring base sold with a value pack. Frequency Range: 462.5500 - 467.7250 MHz