A bronze base for mounting air terminals on vertical or horizontal pipes or railings where conductor is not required up to 6-3/4 in. (17.15 cm) OD. Stainless steel U-bolt, nuts and washers. 8 x 8-1/2 x 1-1/2 in. (20.3 x 21.6 x 3.8 cm); approximately 26 oz. (1304 g). Use suffix 1/2 and 5/8 inch to denote air terminal thread size. Also available drilled out with no threads and a set screw for use as a brace.