Power Distribution Single Pole Blocks: Type - Non-Feed-Thru Junction Block; Thread-Stud Size - 1/2-13; Current Rating - 400A; Stud Material - Steel; Base Material - Thermoplastic; Base Color - Black; Base LxWxH - 2.75 x 1.87 x 1.12" (69.8 x 47.6 x 28.6 mm); Stud Length - Side A - 1.50" (38.1 mm)