IDEAL Barrier Strips are designed and manufactured to be rugged, reliable, and easy to use. A thermoplastic base and corrosion-resistant screws and hardware provide extended service life. Modular 12-circuit design can be cut into sections or stacked end to end Recessed screws and tubular contacts provide added safety and help prevent short circuits Tubular contacts connect stripped, un-terminated solid or stranded wire directly to each contact Integrated wire protectors prevent twisting and breakage of stranded wire during connection Rugged nylon construction rated to UL 94V2 Ratings: Wire Range 22 - 10 AWG, 30A/300V UL Listed;22 - 12AWG,30A/600V CSA Certified.