Full Technical Description: In Line With Barrier Type; 6-1/4 Inch L X 1-5/8 Inch W X 1-3/4 Inch H Size; 250 MCM min. Conductor Size; 750 MCM Max. Conductor Size; Aluminum/Copper Conductor Material; UL 486-B, CSA Approval; Electro Tin Plated High Strength Aluminum Alloy Body Material; No Insulation Type; 4 Screw(S); SR Model