Specification---- Maximum Working Voltage: Dc 48V, Rated At 80A; Max Amp Per Circuit: Determined By Wires Connected. Red Is Positive/Black Is Negative.Strength And Durability---- Double 5/16" Stainless Steel Studs, Lock Washers And Nuts Are Sturdy And Rust Resistant. The Base Is Made Of Flame Retardant Plastic To Protect Your Safety And Ensure High Mechanical Strength And Durability.The Strong Material Of Fiberglass---- Our Products Are Made Of Nylon Reinforced With Fiberglass, These Substrates Are Stronger Than Nylon Or Basic Plastic, Less Affected By Temperature Extremes And More Resistant To Chemicals.Wide Applications---- End Studs Are Suitable For Vehicle Customization Or Battery Replacement. 12-48V Buses, Cars, Trucks, Trailers, Boats, Rvs, Coaches And Other Industrial Equipment Terminate Heavy Duty Cables For Single Or Multiple Connections.Package Includes---- Heavy Duty Terminal Studs: M8 (5/16 Inch) Black * 1, M8 (5/16 Inch) Red * 1, Mounting Screw * 4. Surface Screw Fixed Installation - Two Mounting Holes Make It Easy To Mount In Any Orientation.