A cast bronze base with stainless steel U-bolt, nuts and washers. Fits pipes up to 3" OD. For mounting air terminals to the side of horizontal pipes or railings where conductor is not required. 4.25" x 1.5" (10.8 cm x 3.8 cm); approximately 17.6 oz. (498 grams). Use suffix 3/8 or 1/2 to denote air terminal thread size.