Bus bar - 7 Position Alleviates multiple connections to battery terminals by allowing you to connect various power accessories, Stainless steel #304 studs allow for excellent electrical contact, Bus material made of tin-plated solid copper for maximum conductivity and resistance to corrosion, Base and cover material is made of polycarbonate, Continuous amperage of 130-amps ac, 150-amps dc, Maximum voltage rating 300-volts ac, 48-volts dc