The tool-less disconnect battery main cable terminal is tin-plated with stainless steel bolts, which helps prevent post-corrosion The POSITIVE battery cable terminal clamps are 17.5mm, the NEGATIVE is 15.9mm The battery cable terminal connectors fit SAE / TYPE A round auto battery posts The battery cable terminal is perfect for boats, trailers and other vehicles that remain unused for a long time. Package includes 1 pair of car battery terminal connectors (one negative (-) and one positive (+) ground terminal). Color: Black + Red + Silver Material: Copper Size: 9x7x2cm Package Contents: 2 * Battery Main Cable Post Terminal 1 * Hexagon Wrench Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.