Full Technical Description: Electro Tin Plated Aluminum Alloy Material; 4.5 Inch Overall Length; 6 AWG Stranded Aluminum/Copper min. Conductor Size; 350 kcmil Aluminum, 350 kcmil Stranded Copper Max. Conductor Size; Aluminum/Copper Conductor Material; UL 468A/486B, CSA Approval; 2 Conductor(S); 1/2 Inch Stud Size; 3 Inch L X 2.31 Inch W X 0.31 Inch Thk Pad Size; 2 NEMA Pad Hole(S); RoHS Compliant; Installation Torque 275 lb-Inch; Stud Hole Spacing Size 1.75 Inch; TYPE K2A-U Model