Feature:Battery terminal connectors are made of brass material, which has better corrosion resistance, with strong electrical conductivity.It is universal used for automobiles, cars, boats, RV battery terminal connectors.Easy to intall and connect,no need other special tool.Specification:Material: Brass, Iron, Aluminum AlloyColor: Brass ToneOverall Size: 23x31mm / 0.91"x1.22"(W*H)Internal Thread Size: M8External Thread Size: 3/8"Battery Terminal Diameter: 18.9mm / 0.74'', 17.8mm / 0.70''Package Included:1 Pair x Battery Terminal Connectors.