Reliable material: our battery connectors are made of quality copper plating, with corrosion resistance, good electrical conductivity, easy wiring and strong connection; Plastic cover is insulation cover, which is dust-proof and moisture-proof, serving for a long time Wide application: battery cable ends are widely applied for car, vehicle, RV and boat, which have a standard top post battery Delivery Quantity: 1set, Package Contents: Only the above package contents, excluding other products. Size: inner diameter 17mm, 18mm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) Color: black+red (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)