Power Distribution Single Pole Blocks: Type - Feed-Thru Junction Block; Thread-Stud Size - 3/8-16; Current Rating - 250A; Base Material - Thermoplastic; Base Color - Red; Base LxWxH - 2.06 x 0.94 x 0.69" (52.4 x 23.8 x 17.5 mm); Stud Length - Side A - 0.87" (22.2 mm); Stud Length - Side B - 0.94" (23.8 mm)