Siemens Q2020NC Two 20-Amp Single Pole 120-Volt Non-Current Limiting Circuit Breaker Siemens twin circuit breaker type QT 10,000 AIC. Twin 1-pole 20A/20A Twin 1-pole breaker. Non-CTL (not circuit Limiting) no rejection clip. UL Listed & Certified For use in load centers manufactured before 1968. Two 20-Amp single pole Twin 1/2-Inch frame Plug in type Space saving UL listed