The BSLL50U Antenna is rated at 250 watts with unity gain. You can expect years of continuous service.
The radiating elements are copper & copper alloy. In addition, they have an ultraviolet inhibited fiberglass radome for total environmental protection.
These antennas are lightweight at less than 15 lbs. but are designed to easily withstand winds of over 125 MPH.
For more details, please see the BSLL50U Tech Sheet.