A 13 Element Wideband aerial for UHF Channels 21-68. F-Connector fittings. Robust design using an 18mm, 1-piece boom. Aluminium wire rod sets are used for low wind loading. Supplied with a clamp suitable for both horizontal and vertical polarity. Fits masts up to 57mm diameter. Suited to the reception of digital & analogue signals in moderate to strong signal areas.