Reliable Performance: Rated at 250 watts and 2.5dBd gain, you can expect years of continuous service. Available in either 1/4 wave or 1/2 wave configurations. Rugged Construction: The radiating element and support arm are black anodized aluminum. Lightweight: These antennas are lightweight at less than 4 lbs. but are designed to easily withstand winds of over 100 MPH. Simple installation: The included mount is designed to easily mount on a 1.9″ diameter (aluminum Schedule 40) mast which is not supplied.