Specifications include, but are not limited to: TB1-17 Base, Transformer, Breakaway, Cast Aluminum 17" Height, 10 ½ - 13 ½ Top and 13"-15" Bottom Bolt Circle 55 EA 0.0 2 TB2-17 Base, Transformer, Breakaway, Cast Aluminum 17" Height, 10"-12" Top and 10" - 12" Bottom Bolt Circle 70 EA 0.0 3 TB3-17 Base, Transformer, Breakaway, Cast Aluminum 17" Height, 13"-15 1/8" Top and 15 - 17 ½ Bottom Bolt Circle 75 EA 0.0 4 TB1-17 Base, Transformer, Breakaway, Cast Aluminum, Dark Brown 1 EA 0.0 5 TB2-17 Base, Transformer, Breakaway, Cast Aluminum, Dark Brown 1 EA 0.0 6 TB3-17 Base, Transformer, Breakaway, Cast Aluminum Dark Brown 1 EA 0.0 7 TB1-17 Base, Transformer, Breakaway, Cast Aluminum, Black 15 EA 0.0 8 TB2-17 Base, Transformer, Breakaway, Cast Aluminum, Black 20 EA 0.0 9 TB3-17 Base, Transformer, Breakaway, Cast Aluminum, Black 25 EA 0.0 10 TB1-17 Base, Transformer, Breakaway, Cast Aluminum, w/o Mount hdwr, incl grounding lug 1 EA 0.0 11 TB2-17 Base, Transformer, Breakaway, Cast Aluminum, w/o Mount hdwr, incl grounding lug; ASTENERS: All Transformer bases must include a set of connecting bolts, nuts and washers as follows: 4 each connecting bolts 1" OD x 4" L with 3" thread and heavy hex head. Bolts are completely galvanized and made from A325 steel. 4 each galvanized hex head bolts 4 each galvanized lock washers 8 each galvanized flat washers.