Splicers / Reducers, Type: SR- Solid Bearers, conductor range: 1000 AWG-350 AWG.Al/Cu Rated.CMC® Splicers/Reducers are manufactured from high strength 6061-T6 aluminum alloy to insure both maximum strength and conductivity. They are dual rated for both copper and aluminum conductors and are electro tin plated to provide low contact resistance and protection against corrosion. The rounded corners facilitate tapping and a solid center barrier prevents dissimilar metals from coming into contact.90° C Rated (486B Listed). UL listed and CSA certified.