The TV Antenna J-pole antenna mast with a 20' long and 1' diameter pole is the ideal Antenna mast for the 48-100-005, 48-100-004, 48-100-003 or any Outdoor TV Antenna with 1' diameter mounting. The J-Pole has a pivoting foot, which allows for easy installation on vertical or horizontal or any angle surfaces. Mount it on the Eave, Roof, Deck Railing, or any surface. With the J-Pole Pivoting Foot you are able to mount the pole on almost any angle and still be able to install antenna straight up.