Full Technical Description: Electro-Tin Plated Aluminum Alloy Material; 4.75 Inch Overall Length; 500 kcmil Stranded min. Conductor Size; 1000 kcmil Stranded Max. Conductor Size; Aluminum/Copper Conductor Material; UL 468-A, UL 468-B, CSA Approval; 2 Conductor(S); 1/2 Inch Stud Size; 3.03 Inch L X 3.21 Inch W X 0.5 Inch Thk Pad Size; 2 NEMA Pad Hole(S); Stud Hole Spacing Size 1.75 Inch; Installation Torque 375 lb-Inch; K2A-U Model