Hy-Gain TH-5MK2 Tri-Band Beam Antennas are 5-element, 3-band beam antennas designed for broadband, high performance operation on the 20, 15, and 10 meter bands. Broad band performance is accomplished through the use of two fully trapped driven elements. Stainless steel hardware and tubing clamps are used on all electrical connections. The antennas are designed to fit masts from 1.90 in. to 2.50 in. diameters and can be rotated with Hy-Gain CD-45II, Ham-IV, or T2X Tailtwister rotators.