ANTENNAWorks; Power Antenna. ANTENNAWorks; Power Antenna; Fully-Automatic w/6 1 in/25mm Mounting Bases; 31 in. /79cm 5-Section Replac. Mast/55 in.140cm Detachable Cable; Stainless Steel;. (79cm) 5-section replaceable mast with custom mounting bases.